Schedule III (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	$ 0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,080,138,000		6,709,841,000	5,375,440,000
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,182,569,000		1,051,593,000	1,067,272,000
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,709,841,000		5,375,440,000	4,873,875,000
Real Estate Additions	602,586,000		1,888,229,000	505,602,000
Real Estate, Cost of Real Estate Sold	(232,289,000)		(553,828,000)	(4,037,000)
Real Estate, Gross	7,080,138,000		6,709,841,000	5,375,440,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,051,593,000		1,067,272,000	953,573,000
Real Estate Accumulated Depreciation, Depreciation Expense	179,143,000		162,546,000	140,570,000
Real Estate Accumulated Depreciation, Real Estate Sold	(48,167,000)		(178,225,000)	(26,871,000)
Real Estate Accumulated Depreciation	1,182,569,000		1,051,593,000	1,067,272,000
Total Real Estate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	424,200,000
Total Real Estate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	60,746,274
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,413,189,571
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,838,135,653
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,817,731,432
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,458,817,640
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,621,318,481
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,080,136,121
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,182,568,534
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,080,136,121
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,182,568,534
Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	60,746,274
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,121,456,221
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,838,135,653
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,574,074,794
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,189,759,562
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,343,907,106
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,533,666,668
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,182,568,534
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,533,666,668
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,182,568,534
Operating Properties [Member] | 1467 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Aberdeen, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	12,052,635
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	35,325,281
Real Estate and Accumulated Depreciation, Carrying Amount of Land	12,334,030
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	35,043,886
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	47,377,916
Real Estate and Accumulated Depreciation, Accumulated Depreciation	422,091
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	47,377,916
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	422,091
Operating Properties [Member] | 1501 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Aberdeen, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,813,324
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,874,059
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,355,385
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,816,839
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	24,225,929
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	30,042,768
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,166,945
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	30,042,768
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,166,945
Operating Properties [Member] | 869 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Addison, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,194,223
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,201,881
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	81,639
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,194,223
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,283,521
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,477,744
Real Estate and Accumulated Depreciation, Accumulated Depreciation	163,088
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,477,744
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	163,088
Operating Properties [Member] | 901 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Addison, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,055,066
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,984,093
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	331,843
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,055,066
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,315,936
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,371,002
Real Estate and Accumulated Depreciation, Accumulated Depreciation	243,610
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,371,002
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	243,610
Operating Properties [Member] | 200 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,722,683
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,922,645
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	620,045
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,722,683
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	19,542,690
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	24,265,373
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,189,398
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	24,265,373
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,189,398
Operating Properties [Member] | 250 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,599,936
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	12,099,145
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,149,322
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,717,733
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,130,670
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	17,848,403
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,208,971
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	17,848,403
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,208,971
Operating Properties [Member] | 400 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	8,065,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	27,612,516
Real Estate and Accumulated Depreciation, Carrying Amount of Land	8,184,096
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	27,493,920
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	35,678,016
Real Estate and Accumulated Depreciation, Accumulated Depreciation	13,473,371
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	35,678,016
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	13,473,371
Operating Properties [Member] | 650 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,208,248
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	31,999,219
Real Estate and Accumulated Depreciation, Carrying Amount of Land	9,961,788
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	27,245,679
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	37,207,467
Real Estate and Accumulated Depreciation, Accumulated Depreciation	8,276,803
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	37,207,467
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	8,276,803
Operating Properties [Member] | 651 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,308,646
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	17,689,842
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,308,646
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	17,689,842
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	21,998,488
Real Estate and Accumulated Depreciation, Accumulated Depreciation	7,349,337
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	21,998,488
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	7,349,337
Operating Properties [Member] | 700 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,473,120
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	20,186,320
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,174,970
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	19,484,470
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	23,659,440
Real Estate and Accumulated Depreciation, Accumulated Depreciation	9,474,166
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	23,659,440
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	9,474,166
Operating Properties [Member] | 705 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	10,594,027
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	28,536,883
Real Estate and Accumulated Depreciation, Carrying Amount of Land	10,596,767
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	28,534,143
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	39,130,910
Real Estate and Accumulated Depreciation, Accumulated Depreciation	10,949,295
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	39,130,910
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	10,949,295
Operating Properties [Member] | 7165 Ambassador Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	792,999
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,594,584
Real Estate and Accumulated Depreciation, Carrying Amount of Land	804,848
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,582,735
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,387,583
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,735,546
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,387,583
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,735,546
Operating Properties [Member] | 7248 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,670,849
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,307,408
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,536,663
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,670,673
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	17,844,247
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	20,514,920
Real Estate and Accumulated Depreciation, Accumulated Depreciation	7,872,299
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	20,514,920
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	7,872,299
Operating Properties [Member] | 7339 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,187,776
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,592,257
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,197,447
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,582,586
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,780,033
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,389,185
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,780,033
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,389,185
Operating Properties [Member] | 7437 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	717,488
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,022,413
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,376,237
Real Estate and Accumulated Depreciation, Carrying Amount of Land	726,651
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,389,486
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,116,137
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,726,618
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1976
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,116,137
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,726,618
Operating Properties [Member] | 8014 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,019,258
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,900,523
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,645,117
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,274,664
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,919,781
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,646,042
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,919,781
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,646,042
Operating Properties [Member] | 8150 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,564,167
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,919,967
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,571,466
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,912,668
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,484,134
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,887,452
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,484,134
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,887,452
Operating Properties [Member] | 8250 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,025,667
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,010,938
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,035,854
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,000,751
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,036,605
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,557,249
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,036,605
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,557,249
Operating Properties [Member] | 8400 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	6,725,948
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	27,161,555
Real Estate and Accumulated Depreciation, Carrying Amount of Land	7,521,211
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	26,366,292
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	33,887,503
Real Estate and Accumulated Depreciation, Accumulated Depreciation	6,109,054
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	33,887,503
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	6,109,054
Operating Properties [Member] | 6330 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	531,268
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,572,086
Real Estate and Accumulated Depreciation, Carrying Amount of Land	532,047
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,571,307
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,103,354
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,457,545
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,103,354
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,457,545
Operating Properties [Member] | 6350 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	360,027
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,028,297
Real Estate and Accumulated Depreciation, Carrying Amount of Land	560,691
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,827,633
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,388,324
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,275,548
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,388,324
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,275,548
Operating Properties [Member] | 6370 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	540,795
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,959,133
Real Estate and Accumulated Depreciation, Carrying Amount of Land	541,459
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,958,469
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,499,928
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,151,166
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,499,928
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,151,166
Operating Properties [Member] | 6390 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	707,203
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,000,621
Real Estate and Accumulated Depreciation, Carrying Amount of Land	707,867
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,999,957
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,707,824
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,725,562
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,707,824
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,725,562
Operating Properties [Member] | 6520 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	453,315
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,712,509
Real Estate and Accumulated Depreciation, Carrying Amount of Land	484,361
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,681,463
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,165,824
Real Estate and Accumulated Depreciation, Accumulated Depreciation	944,248
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,165,824
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	944,248
Operating Properties [Member] | 6540 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	422,042
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,012,192
Real Estate and Accumulated Depreciation, Carrying Amount of Land	422,730
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,011,504
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,434,234
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,648,926
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,434,234
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,648,926
Operating Properties [Member] | 6560 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	458,281
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,805,111
Real Estate and Accumulated Depreciation, Carrying Amount of Land	458,945
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,804,447
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,263,392
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,906,340
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,263,392
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,906,340
Operating Properties [Member] | 6580 Snowdrift Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	388,328
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,782,863
Real Estate and Accumulated Depreciation, Carrying Amount of Land	389,081
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,782,110
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,171,191
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,636,788
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,171,191
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,636,788
Operating Properties [Member] | 7620 Cetronia Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,091,806
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,851,456
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	258,140
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,093,724
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,107,678
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,201,402
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,031,249
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,201,402
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,031,249
Operating Properties [Member] | 3095 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Atlanta, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	200,351
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,729,161
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	197,738
Real Estate and Accumulated Depreciation, Carrying Amount of Land	200,351
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,926,899
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,127,250
Real Estate and Accumulated Depreciation, Accumulated Depreciation	78,787
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,127,250
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	78,787
Operating Properties [Member] | 3097 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Atlanta, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	188,680
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,721,048
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	83,383
Real Estate and Accumulated Depreciation, Carrying Amount of Land	188,680
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,804,431
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,993,111
Real Estate and Accumulated Depreciation, Accumulated Depreciation	88,681
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,993,111
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	88,681
Operating Properties [Member] | 7030 Buford Highway NE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Atlanta, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	919,850
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,051,340
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	620,926
Real Estate and Accumulated Depreciation, Carrying Amount of Land	919,850
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,672,266
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,592,116
Real Estate and Accumulated Depreciation, Accumulated Depreciation	228,707
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,592,116
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	228,707
Operating Properties [Member] | Barton 150 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Barton Under Needwood, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,196,955
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,643,981
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	(935,703)
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,067,184
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,838,049
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,905,233
Real Estate and Accumulated Depreciation, Accumulated Depreciation	461,655
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	14,905,233
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	461,655
Operating Properties [Member] | 1055-1071 Kingsland Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Batavia, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	727,294
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,367,529
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	158,908
Real Estate and Accumulated Depreciation, Carrying Amount of Land	727,294
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,526,437
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,253,731
Real Estate and Accumulated Depreciation, Accumulated Depreciation	119,118
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,253,731
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	119,118
Operating Properties [Member] | 4606 Richlynn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Belcamp, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	299,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,818,861
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	712,788
Real Estate and Accumulated Depreciation, Carrying Amount of Land	299,600
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,531,649
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,831,249
Real Estate and Accumulated Depreciation, Accumulated Depreciation	977,674
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,831,249
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	977,674
Operating Properties [Member] | 11800 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,769,962
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,829,028
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	232,241
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,769,962
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,061,270
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,831,232
Real Estate and Accumulated Depreciation, Accumulated Depreciation	111,856
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,831,232
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	111,856
Operating Properties [Member] | 11850 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,595,044
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,415,132
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	272,977
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,595,044
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,688,109
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,283,153
Real Estate and Accumulated Depreciation, Accumulated Depreciation	180,373
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,283,153
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	180,373
Operating Properties [Member] | 11900 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,492,036
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,024,038
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	447,214
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,492,036
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,471,252
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,963,288
Real Estate and Accumulated Depreciation, Accumulated Depreciation	184,955
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,963,288
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	184,955
Operating Properties [Member] | 12104 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,021,752
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,503,802
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	391,474
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,021,752
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,895,276
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,917,028
Real Estate and Accumulated Depreciation, Accumulated Depreciation	212,784
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,917,028
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	212,784
Operating Properties [Member] | 12140 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,196,726
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,949,555
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	118,870
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,196,726
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,068,424
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,265,150
Real Estate and Accumulated Depreciation, Accumulated Depreciation	89,485
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,265,150
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	89,485
Operating Properties [Member] | 12200 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,347,882
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,460,291
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	216,607
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,347,882
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,676,898
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,024,780
Real Estate and Accumulated Depreciation, Accumulated Depreciation	71,156
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,024,780
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	71,156
Operating Properties [Member] | 12240 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,479,307
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,159,997
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	253,923
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,479,307
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,413,921
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,893,228
Real Estate and Accumulated Depreciation, Accumulated Depreciation	101,243
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,893,228
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	101,243
Operating Properties [Member] | 1071 Thorndale Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bensenville,IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,173,006
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,280,788
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	234,091
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,173,006
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,514,879
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,687,885
Real Estate and Accumulated Depreciation, Accumulated Depreciation	154,631
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,687,885
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	154,631
Operating Properties [Member] | 1260-1274 Ellis Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bensenville,IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,298,560
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,020,382
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	358,604
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,298,560
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,378,986
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,677,546
Real Estate and Accumulated Depreciation, Accumulated Depreciation	229,722
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,677,546
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	229,722
Operating Properties [Member] | 371-377 Meyer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bensenville,IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,903,423
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,563,953
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	300,151
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,903,423
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,864,104
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,767,527
Real Estate and Accumulated Depreciation, Accumulated Depreciation	199,086
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,767,527
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	199,086
Operating Properties [Member] | 850-880 Devon Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bensenville,IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,958,756
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,959,013
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	564,918
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,958,756
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,523,931
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,482,687
Real Estate and Accumulated Depreciation, Accumulated Depreciation	402,589
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,482,687
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	402,589
Operating Properties [Member] | 10 Emery Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bethlehem, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,591,216
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	32,941,818
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,354,111
Real Estate and Accumulated Depreciation, Carrying Amount of Land	8,945,327
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	32,941,818
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	41,887,145
Real Estate and Accumulated Depreciation, Accumulated Depreciation	34,885
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	41,887,145
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	34,885
Operating Properties [Member] | 2785 Commerce Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bethlehem, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	11,961,623
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	46,473,202
Real Estate and Accumulated Depreciation, Carrying Amount of Land	12,009,985
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	46,424,840
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	58,434,825
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,713,528
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	58,434,825
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,713,528
Operating Properties [Member] | 74 West Broad Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bethlehem, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,096,127
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	14,432,830
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,099,079
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,429,878
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,528,957
Real Estate and Accumulated Depreciation, Accumulated Depreciation	6,235,792
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,528,957
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	6,235,792
Operating Properties [Member] | 10801 Nesbitt Avenue South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	784,577
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,010,219
Real Estate and Accumulated Depreciation, Carrying Amount of Land	786,382
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,008,414
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,794,796
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,620,711
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,794,796
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,620,711
Operating Properties [Member] | 5705 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,113,223
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,052,334
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,148,571
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,016,986
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,165,557
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,886,077
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,165,557
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,886,077
Operating Properties [Member] | 5715 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,263,226
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,360,782
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,310,183
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,264,758
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,669,433
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,934,191
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,697,547
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,934,191
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,697,547
Operating Properties [Member] | 5735 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,263,226
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,360,782
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,090,289
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,264,758
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,449,539
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,714,297
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,001,168
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,714,297
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,001,168
Operating Properties [Member] | 5775 West Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,052,018
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,849,649
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,670,618
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,060,644
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,511,641
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,572,285
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,087,327
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,572,285
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,087,327
Operating Properties [Member] | 6161 Green Valley Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	740,378
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,311,602
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,680,574
Real Estate and Accumulated Depreciation, Carrying Amount of Land	709,961
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,022,593
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,732,554
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,088,791
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1992
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,732,554
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,088,791
Operating Properties [Member] | 6601-6625 W. 78th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,263,060
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	41,737,014
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,310,246
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	41,689,828
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	44,000,074
Real Estate and Accumulated Depreciation, Accumulated Depreciation	16,555,948
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	44,000,074
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	16,555,948
Operating Properties [Member] | 750 Park of Commerce Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Boca Raton, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,430,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	22,129,358
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,473,406
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	22,085,952
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	24,559,358
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,353,261
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	24,559,358
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,353,261
Operating Properties [Member] | 777 Yamato Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Boca Raton, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,101,247
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,077,347
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,792,033
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,501,247
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	22,469,380
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	26,970,627
Real Estate and Accumulated Depreciation, Accumulated Depreciation	9,450,754
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	26,970,627
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	9,450,754
Operating Properties [Member] | 951 Broken Sound Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Boca Raton, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,426,251
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,098,952
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,990,222
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,426,251
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,089,174
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,515,425
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,683,396
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,515,425
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,683,396
Operating Properties [Member] | 1455 Remington Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bolingbrook, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,501,294
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,704,719
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,501,294
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,704,719
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,206,013
Real Estate and Accumulated Depreciation, Accumulated Depreciation	589,578
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,206,013
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	589,578
Operating Properties [Member] | 150 E Crossroads Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bolingbrook, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,078,949
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,143,377
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	845,243
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,078,949
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,988,620
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	18,067,569
Real Estate and Accumulated Depreciation, Accumulated Depreciation	681,812
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	18,067,569
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	681,812
Operating Properties [Member] | 553 S Joliet Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bolingbrook, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,764,831
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	15,109,947
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,016,526
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,764,831
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	16,126,473
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	19,891,304
Real Estate and Accumulated Depreciation, Accumulated Depreciation	830,092
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	19,891,304
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	830,092
Operating Properties [Member] | 400 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Breinigsville, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,859,106
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	10,599,615
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,865,575
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,593,146
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,458,721
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,810,834
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,458,721
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,810,834
Operating Properties [Member] | 8201 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Breinigsville, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,089,719
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,353,910
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,222,168
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,221,461
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,443,629
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,836,038
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,443,629
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,836,038
Operating Properties [Member] | 8500 Industrial Bouldvard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Breinigsville, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	8,752,708
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	39,845,367
Real Estate and Accumulated Depreciation, Carrying Amount of Land	11,511,499
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	37,086,576
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	48,598,075
Real Estate and Accumulated Depreciation, Accumulated Depreciation	7,869,714
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	48,598,075
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	7,869,714
Operating Properties [Member] | 860 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Breinigsville, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	8,118,881
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,885,486
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,400,855
Real Estate and Accumulated Depreciation, Carrying Amount of Land	8,118,881
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	26,286,341
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	34,405,222
Real Estate and Accumulated Depreciation, Accumulated Depreciation	7,806,275
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	34,405,222
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	7,806,275
Operating Properties [Member] | 1485 W Commerce Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Carlisle, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,249,868
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,886,039
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,314,063
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,095,262
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	16,354,708
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	20,449,970
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,401,702
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	20,449,970
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,401,702
Operating Properties [Member] | 40 Logistics Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Carlisle, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	7,981,850
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	32,774,046
Real Estate and Accumulated Depreciation, Carrying Amount of Land	8,081,272
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	32,674,624
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	40,755,896
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,837,960
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	40,755,896
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,837,960
Operating Properties [Member] | 135-195 East Elk Trail [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Carol Stream, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,873,094
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	12,430,320
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	661,228
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,873,094
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,091,548
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	17,964,642
Real Estate and Accumulated Depreciation, Accumulated Depreciation	418,477
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	17,964,642
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	418,477
Operating Properties [Member] | 515 Kehoe Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Carol Stream, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,523,427
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,581,705
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	202,677
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,523,427
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,784,382
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	20,307,809
Real Estate and Accumulated Depreciation, Accumulated Depreciation	495,025
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	20,307,809
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	495,025
Operating Properties [Member] | 1413 Bradley Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Carrollton, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	247,477
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,028,322
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	83,523
Real Estate and Accumulated Depreciation, Carrying Amount of Land	247,477
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,111,845
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,359,322
Real Estate and Accumulated Depreciation, Accumulated Depreciation	97,622
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,359,322
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	97,622
Operating Properties [Member] | 3200 Belmeade Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Carrollton, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,042,453
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	8,027,974
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	401,254
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,042,453
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,429,228
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,471,681
Real Estate and Accumulated Depreciation, Accumulated Depreciation	360,866
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,471,681
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	360,866
Operating Properties [Member] | 1475 Nitterhouse Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chambersburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	7,081,007
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	39,002,011
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,091,556
Real Estate and Accumulated Depreciation, Carrying Amount of Land	7,081,007
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	41,093,567
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	48,174,574
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,805,946
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	48,174,574
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,805,946
Operating Properties [Member] | 95 Kriner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chambersburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	8,695,501
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	34,926,589
Real Estate and Accumulated Depreciation, Carrying Amount of Land	9,407,871
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	34,214,219
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	43,622,090
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,767,870
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	43,622,090
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,767,870
Operating Properties [Member] | 9000 109th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Champlain, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,251,043
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,662,995
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	119,919
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,251,043
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,782,914
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,033,957
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,144,351
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,033,957
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,144,351
Operating Properties [Member] | 11701 Goodrich Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,054,621
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,356,151
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	631,251
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,054,621
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,987,401
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,042,022
Real Estate and Accumulated Depreciation, Accumulated Depreciation	580,952
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,042,022
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	580,952
Operating Properties [Member] | 12810 Virkler Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	475,368
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,367,586
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	706,208
Real Estate and Accumulated Depreciation, Carrying Amount of Land	476,262
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,072,899
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,549,161
Real Estate and Accumulated Depreciation, Accumulated Depreciation	294,635
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,549,161
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	294,635
Operating Properties [Member] | 2700 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	912,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,721,259
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	293,785
Real Estate and Accumulated Depreciation, Carrying Amount of Land	912,500
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,015,044
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,927,544
Real Estate and Accumulated Depreciation, Accumulated Depreciation	460,922
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,927,544
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	460,922
Operating Properties [Member] | 2701 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,275,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,649,750
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	651,875
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,275,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,301,625
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,576,625
Real Estate and Accumulated Depreciation, Accumulated Depreciation	495,724
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,576,625
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	495,724
Operating Properties [Member] | 2730 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,878,750
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,129,499
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	30,657
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,878,750
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,160,156
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,038,906
Real Estate and Accumulated Depreciation, Accumulated Depreciation	885,076
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,038,906
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	885,076
Operating Properties [Member] | 2801 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,065,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,975,250
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	211,801
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,065,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,187,051
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,252,051
Real Estate and Accumulated Depreciation, Accumulated Depreciation	656,037
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,252,051
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	656,037
Operating Properties [Member] | 3000 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,831,250
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,779,412
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	179,996
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,831,250
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,959,408
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,790,658
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,026,986
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,790,658
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,026,986
Operating Properties [Member] | 3005 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,990,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,561,540
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	442,677
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,990,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,004,217
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,994,217
Real Estate and Accumulated Depreciation, Accumulated Depreciation	648,233
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,994,217
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	648,233
Operating Properties [Member] | 4045 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,418,928
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,511,050
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,510
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,418,928
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,519,560
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,938,488
Real Estate and Accumulated Depreciation, Accumulated Depreciation	790,434
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,938,488
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	790,434
Operating Properties [Member] | 4047 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,279,004
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,396,981
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,279,004
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,396,981
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,675,985
Real Estate and Accumulated Depreciation, Accumulated Depreciation	490,797
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,675,985
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	490,797
Operating Properties [Member] | 4525 Statesville Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	841,250
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,279,315
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	313,661
Real Estate and Accumulated Depreciation, Carrying Amount of Land	837,144
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,597,082
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,434,226
Real Estate and Accumulated Depreciation, Accumulated Depreciation	492,662
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,434,226
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	492,662
Operating Properties [Member] | 4835 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	4,055,621
Real Estate and Accumulated Depreciation, Initial Cost of Land	690,750
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,086,388
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	182,041
Real Estate and Accumulated Depreciation, Carrying Amount of Land	690,750
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,268,429
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,959,179
Real Estate and Accumulated Depreciation, Accumulated Depreciation	465,537
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,959,179
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	465,537
Operating Properties [Member] | 4925 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	4,011,687
Real Estate and Accumulated Depreciation, Initial Cost of Land	603,003
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,969,011
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	31,500
Real Estate and Accumulated Depreciation, Carrying Amount of Land	603,003
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,000,511
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,603,514
Real Estate and Accumulated Depreciation, Accumulated Depreciation	392,055
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,603,514
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	392,055
Operating Properties [Member] | 5033 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	3,521,593
Real Estate and Accumulated Depreciation, Initial Cost of Land	509,247
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,710,218
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	193,375
Real Estate and Accumulated Depreciation, Carrying Amount of Land	613,962
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,798,878
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,412,840
Real Estate and Accumulated Depreciation, Accumulated Depreciation	306,891
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,412,840
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	306,891
Operating Properties [Member] | 5039 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,027,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,172,807
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	20,992
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,027,500
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,193,799
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,221,299
Real Estate and Accumulated Depreciation, Accumulated Depreciation	41,665
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,221,299
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	41,665
Operating Properties [Member] | 8910 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	527,873
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,959,206
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	51,226
Real Estate and Accumulated Depreciation, Carrying Amount of Land	527,873
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,010,432
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,538,305
Real Estate and Accumulated Depreciation, Accumulated Depreciation	440,808
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,538,305
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	440,808
Operating Properties [Member] | 8916 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	557,730
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,785,333
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	345,123
Real Estate and Accumulated Depreciation, Carrying Amount of Land	557,730
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,130,456
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,688,186
Real Estate and Accumulated Depreciation, Accumulated Depreciation	537,610
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,688,186
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	537,610
Operating Properties [Member] | 1301 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	997,570
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,090,852
Real Estate and Accumulated Depreciation, Carrying Amount of Land	970,151
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,118,271
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,088,422
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,070,574
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,088,422
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,070,574
Operating Properties [Member] | 1305 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	861,020
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,317,649
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,129,850
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,048,819
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,178,669
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,470,458
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,178,669
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,470,458
Operating Properties [Member] | 1309 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	926,125
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,098,066
Real Estate and Accumulated Depreciation, Carrying Amount of Land	955,374
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,068,817
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,024,191
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,755,796
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,024,191
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,755,796
Operating Properties [Member] | 1313 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,180,036
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,146,319
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,708,050
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,618,305
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,326,355
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,661,772
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,326,355
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,661,772
Operating Properties [Member] | 2601 Indian River Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,711,746
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,418,032
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	433,142
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,711,746
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,851,174
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,562,920
Real Estate and Accumulated Depreciation, Accumulated Depreciation	488,122
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,562,920
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	488,122
Operating Properties [Member] | 500 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	864,150
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,427,285
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	660,242
Real Estate and Accumulated Depreciation, Carrying Amount of Land	866,609
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,085,068
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,951,677
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,647,398
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,951,677
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,647,398
Operating Properties [Member] | 501 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,202,556
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,975,538
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,588,745
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,292,273
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,474,566
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,766,839
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,047,049
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,766,839
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,047,049
Operating Properties [Member] | 505 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,292,062
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,456,515
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,413,739
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,292,254
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,870,061
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,162,315
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,014,499
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,162,315
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,014,499
Operating Properties [Member] | 510 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,012,149
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,546,882
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,015,278
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,014,689
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,559,621
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,574,310
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,462,068
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,574,310
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,462,068
Operating Properties [Member] | 676 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,527,303
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	11,380,921
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,562,903
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,345,321
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,908,224
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,668,090
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,908,224
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,668,090
Operating Properties [Member] | 700 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,950,375
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,236,994
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	663,174
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,951,135
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,899,408
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,850,543
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,560,770
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,850,543
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,560,770
Operating Properties [Member] | 1540 S 54th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Cicero, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,540,236
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,130,552
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	927,655
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,540,236
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	21,058,207
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	24,598,443
Real Estate and Accumulated Depreciation, Accumulated Depreciation	872,113
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	24,598,443
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	872,113
Operating Properties [Member] | 4650 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Cinncinnati, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,030,242
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,003,024
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	150,831
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,030,242
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,153,854
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,184,096
Real Estate and Accumulated Depreciation, Accumulated Depreciation	191,841
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,184,096
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	191,841
Operating Properties [Member] | 4750 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Cinncinnati, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,138,166
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,914,789
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	197,670
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,138,166
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,112,459
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,250,625
Real Estate and Accumulated Depreciation, Accumulated Depreciation	305,507
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,250,625
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	305,507
Operating Properties [Member] | 9645 Gerwig Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Columbia, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,915,960
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,461,228
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	320,391
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,915,960
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,781,619
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,697,579
Real Estate and Accumulated Depreciation, Accumulated Depreciation	318,937
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,697,579
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	318,937
Operating Properties [Member] | 2550 John Glenn Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Columbus, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	540,601
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,129,342
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	169,332
Real Estate and Accumulated Depreciation, Carrying Amount of Land	540,601
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,298,674
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,839,275
Real Estate and Accumulated Depreciation, Accumulated Depreciation	220,056
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,839,275
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	220,056
Operating Properties [Member] | 3800 Twin Creeks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Columbus, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	549,393
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,643,302
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	181,695
Real Estate and Accumulated Depreciation, Carrying Amount of Land	549,393
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,824,997
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,374,390
Real Estate and Accumulated Depreciation, Accumulated Depreciation	223,841
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,374,390
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	223,841
Operating Properties [Member] | 455 Airline Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Coppell, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	312,701
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,311,531
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	742,190
Real Estate and Accumulated Depreciation, Carrying Amount of Land	312,701
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,053,721
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,366,422
Real Estate and Accumulated Depreciation, Accumulated Depreciation	202,145
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,366,422
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	202,145
Operating Properties [Member] | 2130 Baldwin Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Crofton, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,172,032
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,350,782
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	418,907
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,172,032
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,769,689
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,941,721
Real Estate and Accumulated Depreciation, Accumulated Depreciation	345,403
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,941,721
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	345,403
Operating Properties [Member] | 329-333 Herrod Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Dayton, NJ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,039,559
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,863,051
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,217,455
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,039,559
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	23,080,506
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	27,120,065
Real Estate and Accumulated Depreciation, Accumulated Depreciation	895,237
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	27,120,065
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	895,237
Operating Properties [Member] | 1250 Hall Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Deer Park, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	829,570
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,778,327
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	47,399
Real Estate and Accumulated Depreciation, Carrying Amount of Land	831,611
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,823,685
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,655,296
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,053,460
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,655,296
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,053,460
Operating Properties [Member] | 301-321 S Goolsby Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Deerfield Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	498,136
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,781,180
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	162,422
Real Estate and Accumulated Depreciation, Carrying Amount of Land	498,136
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,943,602
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,441,738
Real Estate and Accumulated Depreciation, Accumulated Depreciation	105,281
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,441,738
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	105,281
Operating Properties [Member] | 1680 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Duluth, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,928,412
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,651,819
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	569,167
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,928,412
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,220,986
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,149,398
Real Estate and Accumulated Depreciation, Accumulated Depreciation	331,184
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,149,398
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	331,184
Operating Properties [Member] | 1700 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Duluth, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,082,072
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,496,599
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	444,944
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,082,072
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,941,543
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,023,615
Real Estate and Accumulated Depreciation, Accumulated Depreciation	166,657
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,023,615
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	166,657
Operating Properties [Member] | 2670 Breckinridge Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Duluth, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,676,415
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,567,592
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	637,896
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,676,415
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,205,489
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,881,904
Real Estate and Accumulated Depreciation, Accumulated Depreciation	301,450
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,881,904
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	301,450
Operating Properties [Member] | 170 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Duncan, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	598,348
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,643,756
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	205,725
Real Estate and Accumulated Depreciation, Carrying Amount of Land	598,918
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,848,911
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,447,829
Real Estate and Accumulated Depreciation, Accumulated Depreciation	971,351
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,447,829
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	971,351
Operating Properties [Member] | 190 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Duncan, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	551,663
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,310,993
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	249,227
Real Estate and Accumulated Depreciation, Carrying Amount of Land	552,211
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,559,671
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,111,882
Real Estate and Accumulated Depreciation, Accumulated Depreciation	773,710
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,111,882
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	773,710
Operating Properties [Member] | 265 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Duncan, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	901,444
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,751,389
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	190,639
Real Estate and Accumulated Depreciation, Carrying Amount of Land	902,374
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,941,098
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,843,472
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,591,923
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,843,472
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,591,923
Operating Properties [Member] | 285 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Duncan, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	975,433
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,851,990
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	358,457
Real Estate and Accumulated Depreciation, Carrying Amount of Land	976,393
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,209,487
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,185,880
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,389,150
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,185,880
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,389,150
Operating Properties [Member] | 1000 Parliament Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,229,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,064,506
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	(6,132)
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,229,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,058,374
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,287,374
Real Estate and Accumulated Depreciation, Accumulated Depreciation	141,180
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,287,374
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	141,180
Operating Properties [Member] | 4226 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,440,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,932,265
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	119,316
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,440,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,051,581
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,491,581
Real Estate and Accumulated Depreciation, Accumulated Depreciation	147,601
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,491,581
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	147,601
Operating Properties [Member] | 4227 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,624,030
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	20,889
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,500,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,644,918
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,144,918
Real Estate and Accumulated Depreciation, Accumulated Depreciation	94,358
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,144,918
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	94,358
Operating Properties [Member] | 4234 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,440,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,356,161
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	(5,933)
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,440,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,350,228
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,790,228
Real Estate and Accumulated Depreciation, Accumulated Depreciation	141,372
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,790,228
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	141,372
Operating Properties [Member] | 4300 Emperor Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,576,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,240,961
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,576,500
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,240,961
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,817,461
Real Estate and Accumulated Depreciation, Accumulated Depreciation	75,792
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,817,461
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	75,792
Operating Properties [Member] | 3169 Dodd Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eagan, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	988,594
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,586,907
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land	988,594
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,586,907
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,575,501
Real Estate and Accumulated Depreciation, Accumulated Depreciation	538,170
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,575,501
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	538,170
Operating Properties [Member] | 3255 Neil Armstrong Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eagan, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,131,017
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,366,267
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,103,860
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,393,424
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,497,284
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,361,295
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,497,284
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,361,295
Operating Properties [Member] | 3711 Kennebec Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eagan, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	999,702
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,042,589
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	312,232
Real Estate and Accumulated Depreciation, Carrying Amount of Land	999,702
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,354,821
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,354,523
Real Estate and Accumulated Depreciation, Accumulated Depreciation	567,528
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,354,523
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	567,528
Operating Properties [Member] | 917 Lone Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eagan, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,493,115
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,120,455
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	711,446
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,493,115
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,831,901
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,325,016
Real Estate and Accumulated Depreciation, Accumulated Depreciation	387,420
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,325,016
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	387,420
Operating Properties [Member] | 10301-10305 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	120,622
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,085,226
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	209,456
Real Estate and Accumulated Depreciation, Carrying Amount of Land	118,300
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,297,004
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,415,304
Real Estate and Accumulated Depreciation, Accumulated Depreciation	540,055
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,415,304
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	540,055
Operating Properties [Member] | 10321 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	145,198
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,305,700
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	571,300
Real Estate and Accumulated Depreciation, Carrying Amount of Land	142,399
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,879,799
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,022,198
Real Estate and Accumulated Depreciation, Accumulated Depreciation	741,150
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,022,198
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	741,150
Operating Properties [Member] | 10333 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	110,746
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	995,868
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	395,071
Real Estate and Accumulated Depreciation, Carrying Amount of Land	108,610
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,393,075
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,501,685
Real Estate and Accumulated Depreciation, Accumulated Depreciation	686,758
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,501,685
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	686,758
Operating Properties [Member] | 10349-10357 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	275,903
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,481,666
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	790,745
Real Estate and Accumulated Depreciation, Carrying Amount of Land	270,584
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,277,730
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,548,314
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,473,755
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,548,314
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,473,755
Operating Properties [Member] | 10365-10375 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	291,077
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,618,194
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	905,655
Real Estate and Accumulated Depreciation, Carrying Amount of Land	285,464
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,529,462
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,814,926
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,470,536
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,814,926
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,470,536
Operating Properties [Member] | 10393-10394 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	269,618
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,423,318
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,397,727
Real Estate and Accumulated Depreciation, Carrying Amount of Land	264,419
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,826,244
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,090,663
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,356,626
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,090,663
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,356,626
Operating Properties [Member] | 10400 Viking Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,912,391
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	23,631,155
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,938,372
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	23,605,174
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	26,543,546
Real Estate and Accumulated Depreciation, Accumulated Depreciation	10,312,893
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	26,543,546
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	10,312,893
Operating Properties [Member] | 7075 Flying Cloud Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	10,232,831
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,855,851
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	53,338
Real Estate and Accumulated Depreciation, Carrying Amount of Land	10,243,977
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,898,042
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	21,142,019
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,135,275
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	21,142,019
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,135,275
Operating Properties [Member] | 7078 Shady Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	343,093
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,085,795
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,528,369
Real Estate and Accumulated Depreciation, Carrying Amount of Land	336,481
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,620,776
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,957,257
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,037,707
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,957,257
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,037,707
Operating Properties [Member] | 7615 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,011,517
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,042,963
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,000,555
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,053,925
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,054,480
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,509,222
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,054,480
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,509,222
Operating Properties [Member] | 7625 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,500,641
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,282,060
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,916,609
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,866,092
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,782,701
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,366,800
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,782,701
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,366,800
Operating Properties [Member] | 7695-7699 Anagram Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	760,525
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,254,758
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,171,692
Real Estate and Accumulated Depreciation, Carrying Amount of Land	760,525
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,426,450
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,186,975
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,103,041
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,186,975
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,103,041
Operating Properties [Member] | 7777 Golden Triangle Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	993,101
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,136,862
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,299,413
Real Estate and Accumulated Depreciation, Carrying Amount of Land	993,101
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,436,274
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,429,375
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,399,635
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,429,375
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,399,635
Operating Properties [Member] | 7800 Equitable Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,188,525
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,788,762
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	573,212
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,188,525
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,361,973
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,550,498
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,608,943
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1993
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,550,498
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,608,943
Operating Properties [Member] | 7905 Fuller Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,229,862
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,075,167
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,980,136
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,230,965
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,054,200
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,285,165
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,258,697
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1994
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,285,165
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,258,697
Operating Properties [Member] | 8855 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,400,925
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,199,574
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,599,757
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,000,742
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,600,499
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,322,395
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,600,499
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,322,395
Operating Properties [Member] | 8911 Columbine Road (B2) [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	916,687
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,444,635
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,718,407
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,642,915
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,361,322
Real Estate and Accumulated Depreciation, Accumulated Depreciation	913,476
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,361,322
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	913,476
Operating Properties [Member] | 8937 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,325,829
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,872,477
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,739,966
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,458,340
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,198,306
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,468,530
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,198,306
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,468,530
Operating Properties [Member] | 8967 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,450,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,536,312
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,450,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,536,312
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,986,312
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,565,519
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,986,312
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,565,519
Operating Properties [Member] | 8995 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,087,594
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,610,464
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,055,296
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,642,762
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,698,058
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,122,150
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,698,058
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,122,150
Operating Properties [Member] | 9023 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,956,273
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,223,935
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,956,273
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,223,935
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,180,208
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,262,205
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,180,208
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,262,205
Operating Properties [Member] | 2250 Arthur Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Elk Grove, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,403,196
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,386,396
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	51,263
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,403,196
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,437,659
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,840,855
Real Estate and Accumulated Depreciation, Accumulated Depreciation	110,507
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,840,855
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	110,507
Operating Properties [Member] | 6600 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Elkridge, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,680,220
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,671,910
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	395,304
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,680,220
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	15,067,214
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	18,747,434
Real Estate and Accumulated Depreciation, Accumulated Depreciation	564,896
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	18,747,434
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	564,896
Operating Properties [Member] | 6675 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Elkridge, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,421,854
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,730,192
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	271,090
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,421,854
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,001,282
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,423,136
Real Estate and Accumulated Depreciation, Accumulated Depreciation	383,902
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,423,136
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	383,902
Operating Properties [Member] | 7351 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Elkridge, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,897,044
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,287,620
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,023,417
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,161,247
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,184,664
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,466,278
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,184,664
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,466,278
Operating Properties [Member] | 21705-21707 Mississippi Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Elwood, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	10,594,259
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	30,329,802
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	892,439
Real Estate and Accumulated Depreciation, Carrying Amount of Land	10,594,259
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	31,222,242
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	41,816,501
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,850,990
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	41,816,501
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,850,990
Operating Properties [Member] | 27143 S Baseline Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Elwood, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	6,022,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,612,934
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	316,780
Real Estate and Accumulated Depreciation, Carrying Amount of Land	6,022,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,929,714
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,951,714
Real Estate and Accumulated Depreciation, Accumulated Depreciation	585,497
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,951,714
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	585,497
Operating Properties [Member] | 1800 Donaldson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Erlanger, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,211,604
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	616,661
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,828,265
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,828,265
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,076,746
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,828,265
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,076,746
Operating Properties [Member] | 180 Sheree Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Exton, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,647,861
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,334,403
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,771,018
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,649,426
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,103,856
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	16,753,282
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,581,319
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	16,753,282
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,581,319
Operating Properties [Member] | 6880 Fairfield Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Fairfield, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	412,136
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,029,177
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	74,745
Real Estate and Accumulated Depreciation, Carrying Amount of Land	412,136
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,103,922
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,516,058
Real Estate and Accumulated Depreciation, Accumulated Depreciation	129,645
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,516,058
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	129,645
Operating Properties [Member] | 7000-7018 Fairfield Business [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Fairfield, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	367,925
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,205,817
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	79,892
Real Estate and Accumulated Depreciation, Carrying Amount of Land	367,925
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,285,709
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,653,634
Real Estate and Accumulated Depreciation, Accumulated Depreciation	105,435
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,653,634
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	105,435
Operating Properties [Member] | 2000 Southpointe Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Forest Park, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	756,221
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,115,626
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	499,723
Real Estate and Accumulated Depreciation, Carrying Amount of Land	756,221
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,615,349
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,371,570
Real Estate and Accumulated Depreciation, Accumulated Depreciation	426,230
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,371,570
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	426,230
Operating Properties [Member] | 1400 NW 65th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Fort Lauderdale, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	545,480
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,540,210
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	66,119
Real Estate and Accumulated Depreciation, Carrying Amount of Land	545,480
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,606,329
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,151,809
Real Estate and Accumulated Depreciation, Accumulated Depreciation	98,750
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,151,809
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	98,750
Operating Properties [Member] | 6500 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Fort Lauderdale, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,064,734
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	275,929
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,340,663
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,340,663
Real Estate and Accumulated Depreciation, Accumulated Depreciation	149,571
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,340,663
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	149,571
Operating Properties [Member] | 6501 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Fort Lauderdale, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	519,984
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,677,465
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	51,998
Real Estate and Accumulated Depreciation, Carrying Amount of Land	519,984
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,729,463
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,249,447
Real Estate and Accumulated Depreciation, Accumulated Depreciation	109,792
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,249,447
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	109,792
Operating Properties [Member] | 6600 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Fort Lauderdale, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,988,181
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	184,139
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,172,320
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,172,320
Real Estate and Accumulated Depreciation, Accumulated Depreciation	144,246
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,172,320
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	144,246
Operating Properties [Member] | 5400 Alliance Gateway Freeway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Fort Worth, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,515,860
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,710,118
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	403,669
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,515,860
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,113,787
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,629,647
Real Estate and Accumulated Depreciation, Accumulated Depreciation	385,887
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,629,647
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	385,887
Operating Properties [Member] | 101 Constitution Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Franklin, MA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	532,339
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,206,412
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	362,342
Real Estate and Accumulated Depreciation, Carrying Amount of Land	532,339
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,568,754
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,101,093
Real Estate and Accumulated Depreciation, Accumulated Depreciation	289,771
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,101,093
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	289,771
Operating Properties [Member] | 20 Liberty Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Franklin, MA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	618,521
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,570,341
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	366,408
Real Estate and Accumulated Depreciation, Carrying Amount of Land	618,521
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,936,749
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,555,270
Real Estate and Accumulated Depreciation, Accumulated Depreciation	257,465
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,555,270
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	257,465
Operating Properties [Member] | 9601 Cosner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Fredericksburg, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	475,262
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,917,234
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	242,595
Real Estate and Accumulated Depreciation, Carrying Amount of Land	475,262
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,159,829
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,635,091
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,034,337
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,635,091
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,034,337
Operating Properties [Member] | 200 W Cypress Creek Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Ft. Lauderdale, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,414,989
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,399,738
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,526,679
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,414,989
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,926,417
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,341,406
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,514,829
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,341,406
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,514,829
Operating Properties [Member] | 5410 - 5430 Northwest 33rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Ft. Lauderdale, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	603,776
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,176,238
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,476,816
Real Estate and Accumulated Depreciation, Carrying Amount of Land	625,111
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,631,719
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,256,830
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,437,758
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,256,830
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,437,758
Operating Properties [Member] | 12601 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Garden Grove, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,048,143
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,088,697
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	70,518
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,048,143
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,159,215
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,207,358
Real Estate and Accumulated Depreciation, Accumulated Depreciation	91,839
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,207,358
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	91,839
Operating Properties [Member] | 12641 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Garden Grove, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,766,822
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,539,214
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	132,812
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,766,822
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,672,026
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,438,848
Real Estate and Accumulated Depreciation, Accumulated Depreciation	121,987
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,438,848
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	121,987
Operating Properties [Member] | 12681-12691 Pala Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Garden Grove, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,221,102
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,225,596
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	(1,521)
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,220,148
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,225,029
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,445,177
Real Estate and Accumulated Depreciation, Accumulated Depreciation	56,969
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,445,177
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	56,969
Operating Properties [Member] | 850 S Jupiter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Garland, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	799,707
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,122,065
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	402,188
Real Estate and Accumulated Depreciation, Carrying Amount of Land	799,707
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,524,253
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,323,960
Real Estate and Accumulated Depreciation, Accumulated Depreciation	263,880
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,323,960
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	263,880
Operating Properties [Member] | 2510 W Main Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Grand Prairie, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,785,741
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,158,818
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	988,249
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,785,741
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,147,067
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,932,808
Real Estate and Accumulated Depreciation, Accumulated Depreciation	668,776
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,932,808
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	668,776
Operating Properties [Member] | 4251 North Highway 121 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Grapevine, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,165,780
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,799,270
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	420,260
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,165,780
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,219,529
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,385,309
Real Estate and Accumulated Depreciation, Accumulated Depreciation	384,152
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,385,309
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	384,152
Operating Properties [Member] | 116 Pleasant Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greenville, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,547,811
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	14,181,664
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,712,683
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,016,792
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,729,475
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,982,229
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,729,475
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,982,229
Operating Properties [Member] | 25 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greenville, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	288,823
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,441,512
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	28,405
Real Estate and Accumulated Depreciation, Carrying Amount of Land	288,823
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,469,917
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,758,740
Real Estate and Accumulated Depreciation, Accumulated Depreciation	126,648
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,758,740
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	126,648
Operating Properties [Member] | 45 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greenville, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	818,114
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,468,582
Real Estate and Accumulated Depreciation, Carrying Amount of Land	825,529
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,461,167
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,286,696
Real Estate and Accumulated Depreciation, Accumulated Depreciation	847,825
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,286,696
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	847,825
Operating Properties [Member] | 2011 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greenwood, IN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	223,702
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,574,142
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	310,465
Real Estate and Accumulated Depreciation, Carrying Amount of Land	223,702
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,884,607
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,108,309
Real Estate and Accumulated Depreciation, Accumulated Depreciation	215,974
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,108,309
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	215,974
Operating Properties [Member] | 2121 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greenwood, IN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	272,823
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,606,920
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	411,808
Real Estate and Accumulated Depreciation, Carrying Amount of Land	272,823
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,018,729
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,291,552
Real Estate and Accumulated Depreciation, Accumulated Depreciation	269,601
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,291,552
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	269,601
Operating Properties [Member] | 800 Commerce Parkway West Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greenwood, IN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,374,664
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,963,830
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,540,221
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,374,664
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	31,504,051
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	32,878,715
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,328,513
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	32,878,715
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,328,513
Operating Properties [Member] | 100 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	555,549
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,305,563
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,228,880
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,632,232
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,861,112
Real Estate and Accumulated Depreciation, Accumulated Depreciation	30,651
Real Estate and Accumulated Depreciation, Date Acquired or Developed
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,861,112
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	30,651
Operating Properties [Member] | 1487 South Highway 101 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	464,237
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,829,595
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,301,738
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,992,094
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,293,832
Real Estate and Accumulated Depreciation, Accumulated Depreciation	745,613
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,293,832
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	745,613
Operating Properties [Member] | 2727 London Grove Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Groveport, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,875,607
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,937,935
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	334,714
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,875,607
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,272,649
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,148,256
Real Estate and Accumulated Depreciation, Accumulated Depreciation	598,991
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	14,148,256
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	598,991
Operating Properties [Member] | 11841 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hagerstown, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,356,207
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	30,555,105
Real Estate and Accumulated Depreciation, Carrying Amount of Land	9,741,685
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	24,169,627
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	33,911,312
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,362,445
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	33,911,312
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,362,445
Operating Properties [Member] | 1 Enterprise Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hampton, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	974,675
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,579,869
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,727,218
Real Estate and Accumulated Depreciation, Carrying Amount of Land	974,675
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,307,087
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,281,762
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,390,357
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,281,762
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,390,357
Operating Properties [Member] | 1317 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hampton, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,650,423
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,950,516
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,128,829
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,472,110
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,600,939
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,755,394
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,600,939
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,755,394
Operating Properties [Member] | 21 Enterprise Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hampton, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	263,668
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	8,167,118
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,128,297
Real Estate and Accumulated Depreciation, Carrying Amount of Land	265,719
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,293,364
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,559,083
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,548,369
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,559,083
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,548,369
Operating Properties [Member] | 22 Enterprise Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hampton, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,097,368
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,760,778
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,519,852
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,097,368
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,280,630
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,377,998
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,629,037
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,377,998
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,629,037
Operating Properties [Member] | 5 Manhattan Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hampton, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	207,368
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,540,748
Real Estate and Accumulated Depreciation, Carrying Amount of Land	212,694
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,535,422
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,748,116
Real Estate and Accumulated Depreciation, Accumulated Depreciation	543,511
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,748,116
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	543,511
Operating Properties [Member] | 521 Butler Farm Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hampton, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	750,769
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,911,149
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	266,469
Real Estate and Accumulated Depreciation, Carrying Amount of Land	710,486
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,217,901
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,928,387
Real Estate and Accumulated Depreciation, Accumulated Depreciation	957,344
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,928,387
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	957,344
Operating Properties [Member] | 1560 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hanover Park, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,639,734
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	12,310,741
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	578,659
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,639,734
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,889,400
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,529,134
Real Estate and Accumulated Depreciation, Accumulated Depreciation	543,284
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,529,134
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	543,284
Operating Properties [Member] | 1575 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hanover Park, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,293,284
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	17,235,926
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	836,967
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,293,284
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	18,072,893
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	21,366,177
Real Estate and Accumulated Depreciation, Accumulated Depreciation	767,470
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	21,366,177
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	767,470
Operating Properties [Member] | 7361 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hanover, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,245,187
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,391,010
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,822,710
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,813,487
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,636,197
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,201,335
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,636,197
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,201,335
Operating Properties [Member] | 500 McCarthy Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Harrisburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,194,872
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	19,991,436
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,541,093
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,687,013
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	24,040,388
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	29,727,401
Real Estate and Accumulated Depreciation, Accumulated Depreciation	7,143,282
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	29,727,401
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	7,143,282
Operating Properties [Member] | 600 Industrial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Harrisburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	7,743,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	29,161,032
Real Estate and Accumulated Depreciation, Carrying Amount of Land	9,368,557
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	27,536,275
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	36,904,832
Real Estate and Accumulated Depreciation, Accumulated Depreciation	7,033,344
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	36,904,832
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	7,033,344
Operating Properties [Member] | 7195 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Harrisburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	464,534
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,066,272
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	189,405
Real Estate and Accumulated Depreciation, Carrying Amount of Land	464,534
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,255,677
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,720,211
Real Estate and Accumulated Depreciation, Accumulated Depreciation	246,920
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,720,211
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	246,920
Operating Properties [Member] | 7253 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Harrisburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	954,130
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,585,367
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	339,743
Real Estate and Accumulated Depreciation, Carrying Amount of Land	954,130
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,925,110
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,879,240
Real Estate and Accumulated Depreciation, Accumulated Depreciation	407,825
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,879,240
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	407,825
Operating Properties [Member] | 12537 Cerise Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hawthorne, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,203,194
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,758,809
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	94,181
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,203,194
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,852,990
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,056,184
Real Estate and Accumulated Depreciation, Accumulated Depreciation	214,142
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,056,184
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	214,142
Operating Properties [Member] | 1010 Petersburg Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hebron, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	305,471
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,434,505
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	306,564
Real Estate and Accumulated Depreciation, Carrying Amount of Land	305,471
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,741,069
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,046,540
Real Estate and Accumulated Depreciation, Accumulated Depreciation	248,502
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,046,540
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	248,502
Operating Properties [Member] | 785 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hebron, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	401,410
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,087,899
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	466,391
Real Estate and Accumulated Depreciation, Carrying Amount of Land	401,410
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,554,290
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,955,700
Real Estate and Accumulated Depreciation, Accumulated Depreciation	198,999
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,955,700
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	198,999
Operating Properties [Member] | 805 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hebron, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	292,096
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,502,486
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	156,556
Real Estate and Accumulated Depreciation, Carrying Amount of Land	292,096
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,659,041
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,951,137
Real Estate and Accumulated Depreciation, Accumulated Depreciation	134,921
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,951,137
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	134,921
Operating Properties [Member] | 825 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hebron, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	370,149
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,095,116
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	223,435
Real Estate and Accumulated Depreciation, Carrying Amount of Land	370,149
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,318,552
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,688,701
Real Estate and Accumulated Depreciation, Accumulated Depreciation	195,790
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,688,701
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	195,790
Operating Properties [Member] | 845 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hebron, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	444,318
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,811,889
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	257,404
Real Estate and Accumulated Depreciation, Carrying Amount of Land	444,318
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,069,293
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,513,611
Real Estate and Accumulated Depreciation, Accumulated Depreciation	202,478
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,513,611
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	202,478
Operating Properties [Member] | 1498 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	94,274
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,219,495
Real Estate and Accumulated Depreciation, Carrying Amount of Land	791,880
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,521,889
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,313,769
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,175,122
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,313,769
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,175,122
Operating Properties [Member] | 4183 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	122,203
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,309,887
Real Estate and Accumulated Depreciation, Carrying Amount of Land	526,266
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,905,824
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,432,090
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,093,077
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,432,090
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,093,077
Operating Properties [Member] | 4189 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	100,106
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,608,848
Real Estate and Accumulated Depreciation, Carrying Amount of Land	431,106
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,277,848
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,708,954
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,355,746
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,708,954
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,355,746
Operating Properties [Member] | 4195 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	107,586
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,582,764
Real Estate and Accumulated Depreciation, Carrying Amount of Land	505,700
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,184,650
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,690,350
Real Estate and Accumulated Depreciation, Accumulated Depreciation	912,889
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,690,350
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	912,889
Operating Properties [Member] | 4328, 4336 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	1,548,668
Real Estate and Accumulated Depreciation, Initial Cost of Land	521,122
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,525,947
Real Estate and Accumulated Depreciation, Carrying Amount of Land	825,092
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,221,977
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,047,069
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,564,462
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,047,069
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,564,462
Operating Properties [Member] | 4344 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	484,001
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,071,417
Real Estate and Accumulated Depreciation, Carrying Amount of Land	173,623
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,381,795
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,555,418
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,577,538
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,555,418
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,577,538
Operating Properties [Member] | 4380 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	282,996
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,160,892
Real Estate and Accumulated Depreciation, Carrying Amount of Land	283,368
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,160,520
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,443,888
Real Estate and Accumulated Depreciation, Accumulated Depreciation	984,864
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,443,888
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	984,864
Operating Properties [Member] | 4388 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	143,661
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,213,832
Real Estate and Accumulated Depreciation, Carrying Amount of Land	132,655
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,224,838
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,357,493
Real Estate and Accumulated Depreciation, Accumulated Depreciation	533,759
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,357,493
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	533,759
Operating Properties [Member] | 4475 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	748,693
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,805,541
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,525,421
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,028,813
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,554,234
Real Estate and Accumulated Depreciation, Accumulated Depreciation	977,259
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,554,234
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	977,259
Operating Properties [Member] | 4500 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	230,622
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,758,237
Real Estate and Accumulated Depreciation, Carrying Amount of Land	231,692
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,757,167
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,988,859
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,300,726
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,988,859
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,300,726
Operating Properties [Member] | 4501 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	319,289
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,156,348
Real Estate and Accumulated Depreciation, Carrying Amount of Land	320,450
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,155,187
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,475,637
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,618,112
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,475,637
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,618,112
Operating Properties [Member] | 4523 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	234,564
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,338,836
Real Estate and Accumulated Depreciation, Carrying Amount of Land	235,698
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,337,702
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,573,400
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,964,835
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,573,400
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,964,835
Operating Properties [Member] | 4524 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	182,810
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,700,754
Real Estate and Accumulated Depreciation, Carrying Amount of Land	183,888
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,699,676
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,883,564
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,547,668
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,883,564
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,547,668
Operating Properties [Member] | Unit 5 Logix Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hinckley, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	10,547,677
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,691,911
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	(2,376,899)
Real Estate and Accumulated Depreciation, Carrying Amount of Land	9,924,640
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	27,938,049
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	37,862,689
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,028,220
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	37,862,689
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,028,220
Operating Properties [Member] | 1515 6th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hopkins,MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	813,036
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,503,075
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	364,382
Real Estate and Accumulated Depreciation, Carrying Amount of Land	813,036
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,867,457
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,680,493
Real Estate and Accumulated Depreciation, Accumulated Depreciation	148,094
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,680,493
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	148,094
Operating Properties [Member] | 1600 5th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hopkins,MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	339,336
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,106,454
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	80,794
Real Estate and Accumulated Depreciation, Carrying Amount of Land	339,336
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,187,249
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,526,585
Real Estate and Accumulated Depreciation, Accumulated Depreciation	89,465
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,526,585
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	89,465
Operating Properties [Member] | 100 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	38,729
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	349,811
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	59,073
Real Estate and Accumulated Depreciation, Carrying Amount of Land	38,729
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	408,884
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	447,613
Real Estate and Accumulated Depreciation, Accumulated Depreciation	170,127
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	447,613
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	170,127
Operating Properties [Member] | 100 Witmer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,102,784
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	20,391,485
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,764,784
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	19,729,485
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	23,494,269
Real Estate and Accumulated Depreciation, Accumulated Depreciation	7,044,882
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	23,494,269
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	7,044,882
Operating Properties [Member] | 100-107 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	239,528
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,163,498
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	617,512
Real Estate and Accumulated Depreciation, Carrying Amount of Land	255,528
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,765,010
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,020,538
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,164,464
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,020,538
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,164,464
Operating Properties [Member] | 101 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	651,990
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,888,989
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,076,842
Real Estate and Accumulated Depreciation, Carrying Amount of Land	732,552
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,885,269
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,617,821
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,577,353
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1977
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,617,821
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,577,353
Operating Properties [Member] | 101-111 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	350,561
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,166,389
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,200,013
Real Estate and Accumulated Depreciation, Carrying Amount of Land	452,251
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,264,712
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,716,963
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,015,331
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,716,963
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,015,331
Operating Properties [Member] | 102 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,110,209
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,301,302
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,203,842
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,185,635
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,429,717
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,615,352
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,226,377
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,615,352
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,226,377
Operating Properties [Member] | 103-109 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	270,906
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,448,500
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	459,093
Real Estate and Accumulated Depreciation, Carrying Amount of Land	270,906
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,907,592
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,178,498
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,259,056
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,178,498
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,259,056
Operating Properties [Member] | 104 Witmer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,248,148
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	593,447
Real Estate and Accumulated Depreciation, Carrying Amount of Land	189,793
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,651,802
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,841,595
Real Estate and Accumulated Depreciation, Accumulated Depreciation	686,901
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,841,595
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	686,901
Operating Properties [Member] | 110 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	673,041
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,776,369
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,953,408
Real Estate and Accumulated Depreciation, Carrying Amount of Land	673,041
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,729,777
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,402,818
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,295,384
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1979
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,402,818
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,295,384
Operating Properties [Member] | 111-159 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	489,032
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,126,151
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,275,890
Real Estate and Accumulated Depreciation, Carrying Amount of Land	489,032
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,402,041
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,891,073
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,540,177
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1981
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,891,073
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,540,177
Operating Properties [Member] | 113-123 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	351,072
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,171,001
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	471,717
Real Estate and Accumulated Depreciation, Carrying Amount of Land	451,731
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,542,059
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,993,790
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,488,391
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,993,790
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,488,391
Operating Properties [Member] | 120 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	533,142
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,830,515
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,896,617
Real Estate and Accumulated Depreciation, Carrying Amount of Land	558,142
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,702,132
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,260,274
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,840,804
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1980
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,260,274
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,840,804
Operating Properties [Member] | 123-135 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	292,360
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,411,677
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,125,649
Real Estate and Accumulated Depreciation, Carrying Amount of Land	393,019
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,436,667
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,829,686
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,971,553
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,829,686
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,971,553
Operating Properties [Member] | 132 Welsh Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,333,642
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,856,072
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,408,041
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,781,673
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,189,714
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,658,898
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,189,714
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,658,898
Operating Properties [Member] | 161-175 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	294,673
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,663,722
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	957,148
Real Estate and Accumulated Depreciation, Carrying Amount of Land	294,673
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,620,870
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,915,543
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,661,733
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1976
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,915,543
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,661,733
Operating Properties [Member] | 181-187 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	360,549
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,259,984
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	787,154
Real Estate and Accumulated Depreciation, Carrying Amount of Land	360,549
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,047,138
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,407,687
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,951,593
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,407,687
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,951,593
Operating Properties [Member] | 2 Walnut Grove Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,281,870
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,767,374
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,630,465
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,265,363
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,414,346
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,679,709
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,306,233
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,679,709
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,306,233
Operating Properties [Member] | 200 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	638,513
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,811,323
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,190,173
Real Estate and Accumulated Depreciation, Carrying Amount of Land	638,513
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,001,496
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,640,009
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,588,279
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,640,009
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,588,279
Operating Properties [Member] | 200-264 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	502,705
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,540,597
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,297,906
Real Estate and Accumulated Depreciation, Carrying Amount of Land	502,705
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,838,503
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,341,208
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,983,479
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,341,208
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,983,479
Operating Properties [Member] | 201 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	380,127
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,433,433
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,324,673
Real Estate and Accumulated Depreciation, Carrying Amount of Land	380,802
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,757,431
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,138,233
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,469,255
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,138,233
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,469,255
Operating Properties [Member] | 210-223 Witmer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	270,282
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,441,276
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,098,514
Real Estate and Accumulated Depreciation, Carrying Amount of Land	270,282
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,539,790
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,810,072
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,888,542
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1972
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,810,072
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,888,542
Operating Properties [Member] | 220 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	629,944
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,733,228
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,917,249
Real Estate and Accumulated Depreciation, Carrying Amount of Land	629,944
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,650,477
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,280,421
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,058,488
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,280,421
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,058,488
Operating Properties [Member] | 231-237 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	436,952
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,948,963
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,323,981
Real Estate and Accumulated Depreciation, Carrying Amount of Land	436,952
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,272,944
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,709,896
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,317,867
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1981
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,709,896
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,317,867
Operating Properties [Member] | 240 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	629,944
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,733,234
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,999,990
Real Estate and Accumulated Depreciation, Carrying Amount of Land	629,944
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,733,224
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,363,168
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,841,222
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,363,168
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,841,222
Operating Properties [Member] | 261-283 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	464,871
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,951,972
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,830,425
Real Estate and Accumulated Depreciation, Carrying Amount of Land	464,871
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,782,397
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,247,268
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,644,978
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,247,268
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,644,978
Operating Properties [Member] | 300 Welsh Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	696,061
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,339,991
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	640,370
Real Estate and Accumulated Depreciation, Carrying Amount of Land	696,061
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,980,360
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,676,421
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,823,181
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,676,421
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,823,181
Operating Properties [Member] | 300 Welsh Road - Building 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	180,459
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,441,473
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	633,163
Real Estate and Accumulated Depreciation, Carrying Amount of Land	180,459
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,074,635
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,255,094
Real Estate and Accumulated Depreciation, Accumulated Depreciation	920,446
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,255,094
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	920,446
Operating Properties [Member] | 300 Welsh Road - Building 4 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	282,493
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,256,508
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,769,703
Real Estate and Accumulated Depreciation, Carrying Amount of Land	282,493
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,026,211
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,308,704
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,907,245
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,308,704
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,907,245
Operating Properties [Member] | 300-309 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	369,475
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,338,761
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,834,004
Real Estate and Accumulated Depreciation, Carrying Amount of Land	376,475
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,165,765
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,542,240
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,736,644
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,542,240
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,736,644
Operating Properties [Member] | 4 Walnut Grove [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,515,115
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	10,809,109
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,515,115
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,809,109
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,324,224
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,046,256
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,324,224
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,046,256
Operating Properties [Member] | 400-445 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	543,628
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,910,226
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,849,211
Real Estate and Accumulated Depreciation, Carrying Amount of Land	583,628
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,719,437
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,303,065
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,791,088
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1981
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,303,065
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,791,088
Operating Properties [Member] | 455 Business Center Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,351,011
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,503,449
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,982,282
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,322,317
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,514,425
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,836,742
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,405,567
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,836,742
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,405,567
Operating Properties [Member] | 5 Walnut Grove Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,065,951
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	10,357,952
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,939,712
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,484,191
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,423,903
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,689,060
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,423,903
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,689,060
Operating Properties [Member] | 506 Prudential Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	208,140
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	895,470
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	894,621
Real Estate and Accumulated Depreciation, Carrying Amount of Land	208,140
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,790,091
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,998,231
Real Estate and Accumulated Depreciation, Accumulated Depreciation	878,782
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1973
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,998,231
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	878,782
Operating Properties [Member] | 507 Prudential Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	644,900
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,804,100
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,408,030
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,131,380
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,725,650
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,857,030
Real Estate and Accumulated Depreciation, Accumulated Depreciation	6,683,111
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	14,857,030
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	6,683,111
Operating Properties [Member] | 2920 Northwest Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Plymouth, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	392,026
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,433,678
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	747,609
Real Estate and Accumulated Depreciation, Carrying Amount of Land	384,235
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,189,078
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,573,313
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,667,699
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,573,313
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,667,699
Operating Properties [Member] | 555 Business Center Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	727,420
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,353,650
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,483,904
Real Estate and Accumulated Depreciation, Carrying Amount of Land	709,967
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,855,008
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,564,975
Real Estate and Accumulated Depreciation, Accumulated Depreciation	562,069
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,564,975
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	562,069
Operating Properties [Member] | 5905 Trenton Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Plymouth, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,616,360
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,487,462
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	487,026
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,616,360
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,974,487
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,590,847
Real Estate and Accumulated Depreciation, Accumulated Depreciation	246,351
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,590,847
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	246,351
Operating Properties [Member] | 680 Blair Mill Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,527,151
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	17,513,692
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,138,577
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	16,902,266
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	21,040,843
Real Estate and Accumulated Depreciation, Accumulated Depreciation	6,001,289
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	21,040,843
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	6,001,289
Operating Properties [Member] | 6055 Nathan Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Plymouth, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,327,017
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,527,404
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	476,115
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,327,017
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,003,519
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,330,536
Real Estate and Accumulated Depreciation, Accumulated Depreciation	235,723
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,330,536
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	235,723
Operating Properties [Member] | 7 Walnut Grove Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,631,696
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	18,432,489
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,631,956
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	18,432,229
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	21,064,185
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,441,129
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	21,064,185
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,441,129
Operating Properties [Member] | 1400 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,157,049
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,620,956
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,332,594
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,157,049
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,953,550
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,110,599
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,364,597
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,110,599
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,364,597
Operating Properties [Member] | 700 Dresher Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,551,777
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,020,638
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,596,408
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,565,140
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,603,683
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,168,823
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,485,966
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,168,823
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,485,966
Operating Properties [Member] | 1405 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	392,138
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,565,787
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	444,197
Real Estate and Accumulated Depreciation, Carrying Amount of Land	392,138
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,009,985
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,402,123
Real Estate and Accumulated Depreciation, Accumulated Depreciation	929,892
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,402,123
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	929,892
Operating Properties [Member] | 747 Dresher Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,607,238
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,032,964
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,607,977
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,032,225
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,640,202
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,120,360
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,640,202
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,120,360
Operating Properties [Member] | 1500 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	972,232
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,892,085
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	587,174
Real Estate and Accumulated Depreciation, Carrying Amount of Land	972,232
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,479,259
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,451,491
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,890,450
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1957
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,451,491
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,890,450
Operating Properties [Member] | 767 Electronic Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,229,685
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,436,397
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,241,970
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,424,112
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,666,082
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,433,977
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,666,082
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,433,977
Operating Properties [Member] | 1501 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	203,247
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	811,093
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	364,776
Real Estate and Accumulated Depreciation, Carrying Amount of Land	203,247
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,175,870
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,379,117
Real Estate and Accumulated Depreciation, Accumulated Depreciation	456,473
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,379,117
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	456,473
Operating Properties [Member] | 1000 South Loop West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	509,351
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,549,504
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	395,718
Real Estate and Accumulated Depreciation, Carrying Amount of Land	509,351
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,945,222
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,454,573
Real Estate and Accumulated Depreciation, Accumulated Depreciation	203,455
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,454,573
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	203,455
Operating Properties [Member] | 1601 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	203,247
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	811,093
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	96,949
Real Estate and Accumulated Depreciation, Carrying Amount of Land	203,247
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	908,043
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,111,290
Real Estate and Accumulated Depreciation, Accumulated Depreciation	387,208
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,111,290
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	387,208
Operating Properties [Member] | 10241 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	558,491
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,740,552
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	129,761
Real Estate and Accumulated Depreciation, Carrying Amount of Land	558,491
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,870,313
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,428,804
Real Estate and Accumulated Depreciation, Accumulated Depreciation	218,761
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,428,804
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	218,761
Operating Properties [Member] | 1651 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	203,247
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	811,093
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	183,052
Real Estate and Accumulated Depreciation, Carrying Amount of Land	203,247
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	994,146
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,197,393
Real Estate and Accumulated Depreciation, Accumulated Depreciation	405,613
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,197,393
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	405,613
Operating Properties [Member] | 10245 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	426,927
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,460,513
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	234,333
Real Estate and Accumulated Depreciation, Carrying Amount of Land	426,927
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,694,846
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,121,773
Real Estate and Accumulated Depreciation, Accumulated Depreciation	174,611
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,121,773
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	174,611
Operating Properties [Member] | 2201-2215 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,120,328
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,427,358
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	99,226
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,120,328
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,526,584
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,646,912
Real Estate and Accumulated Depreciation, Accumulated Depreciation	149,765
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,646,912
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	149,765
Operating Properties [Member] | 10301 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	545,501
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,927,700
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,014,387
Real Estate and Accumulated Depreciation, Carrying Amount of Land	545,501
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,942,086
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,487,587
Real Estate and Accumulated Depreciation, Accumulated Depreciation	306,335
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,487,587
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	306,335
Operating Properties [Member] | 2250-2270 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	993,015
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,423,174
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	108,273
Real Estate and Accumulated Depreciation, Carrying Amount of Land	993,015
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,531,447
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,524,462
Real Estate and Accumulated Depreciation, Accumulated Depreciation	117,804
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,524,462
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	117,804
Operating Properties [Member] | 10305 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,340,609
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,489,720
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,358,808
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,340,609
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,848,527
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,189,136
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,387,761
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,189,136
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,387,761
Operating Properties [Member] | 2280-2300 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	906,947
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,157,802
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	158,626
Real Estate and Accumulated Depreciation, Carrying Amount of Land	906,947
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,316,429
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,223,376
Real Estate and Accumulated Depreciation, Accumulated Depreciation	102,313
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,223,376
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	102,313
Operating Properties [Member] | 10607 Haddington Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	201,469
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,631,561
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	175,697
Real Estate and Accumulated Depreciation, Carrying Amount of Land	201,469
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,807,259
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,008,728
Real Estate and Accumulated Depreciation, Accumulated Depreciation	78,814
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,008,728
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	78,814
Operating Properties [Member] | 2301-2329 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,268,707
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,079,811
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	153,822
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,268,707
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,233,633
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,502,340
Real Estate and Accumulated Depreciation, Accumulated Depreciation	149,476
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,502,340
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	149,476
Operating Properties [Member] | 10735 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,110,988
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,351,946
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,271,063
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,135,483
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,598,514
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,733,997
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,691,079
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,733,997
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,691,079
Operating Properties [Member] | 3000 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,087,554
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,897,117
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	155,731
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,087,554
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,052,848
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,140,402
Real Estate and Accumulated Depreciation, Accumulated Depreciation	151,869
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,140,402
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	151,869
Operating Properties [Member] | 10739 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	797,931
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,950,894
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	401,107
Real Estate and Accumulated Depreciation, Carrying Amount of Land	799,560
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,350,372
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,149,932
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,003,943
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,149,932
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,003,943
Operating Properties [Member] | 3001-3037 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,548,542
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,512,041
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	271,076
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,548,542
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,783,118
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,331,660
Real Estate and Accumulated Depreciation, Accumulated Depreciation	174,062
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,331,660
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	174,062
Operating Properties [Member] | 11201 Greens Crossing Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,006,194
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,412,584
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,777,537
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,008,542
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,187,773
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,196,315
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,018,474
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,196,315
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,018,474
Operating Properties [Member] | 1283 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	80,730
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	870,656
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	145,476
Real Estate and Accumulated Depreciation, Carrying Amount of Land	80,730
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,016,132
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,096,862
Real Estate and Accumulated Depreciation, Accumulated Depreciation	48,433
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,096,862
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	48,433
Operating Properties [Member] | 1287 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	146,654
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,620,780
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	59,710
Real Estate and Accumulated Depreciation, Carrying Amount of Land	146,654
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,680,489
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,827,143
Real Estate and Accumulated Depreciation, Accumulated Depreciation	90,144
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,827,143
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	90,144
Operating Properties [Member] | 1291 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	510,102
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,129,042
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	441,345
Real Estate and Accumulated Depreciation, Carrying Amount of Land	510,102
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,570,387
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,080,489
Real Estate and Accumulated Depreciation, Accumulated Depreciation	203,222
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,080,489
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	203,222
Operating Properties [Member] | 1416 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	218,850
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,639,902
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	329,902
Real Estate and Accumulated Depreciation, Carrying Amount of Land	218,850
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,969,803
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,188,653
Real Estate and Accumulated Depreciation, Accumulated Depreciation	82,673
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,188,653
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	82,673
Operating Properties [Member] | 1420 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	211,279
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,554,156
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	111,783
Real Estate and Accumulated Depreciation, Carrying Amount of Land	211,279
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,665,939
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,877,218
Real Estate and Accumulated Depreciation, Accumulated Depreciation	78,870
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,877,218
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	78,870
Operating Properties [Member] | 14200 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,396,794
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,855,857
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,699,632
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,553,019
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,252,651
Real Estate and Accumulated Depreciation, Accumulated Depreciation	303,736
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,252,651
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	303,736
Operating Properties [Member] | 1424 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	283,107
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,077,323
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	284,788
Real Estate and Accumulated Depreciation, Carrying Amount of Land	283,107
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,362,111
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,645,218
Real Estate and Accumulated Depreciation, Accumulated Depreciation	110,954
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,645,218
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	110,954
Operating Properties [Member] | 1428 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	367,446
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,952,453
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	133,350
Real Estate and Accumulated Depreciation, Carrying Amount of Land	367,446
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,085,802
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,453,248
Real Estate and Accumulated Depreciation, Accumulated Depreciation	101,311
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,453,248
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	101,311
Operating Properties [Member] | 14300 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,377,193
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,497,809
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,405,899
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,469,103
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,875,002
Real Estate and Accumulated Depreciation, Accumulated Depreciation	159,872
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,875,002
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	159,872
Operating Properties [Member] | 14400 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,830,419
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,063,858
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,861,540
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,032,737
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,894,277
Real Estate and Accumulated Depreciation, Accumulated Depreciation	442,923
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,894,277
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	442,923
Operating Properties [Member] | 15102 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	755,121
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,155,774
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	247,397
Real Estate and Accumulated Depreciation, Carrying Amount of Land	755,121
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,403,171
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,158,292
Real Estate and Accumulated Depreciation, Accumulated Depreciation	170,031
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,158,292
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	170,031
Operating Properties [Member] | 15150 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	418,580
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,564,587
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	295,011
Real Estate and Accumulated Depreciation, Carrying Amount of Land	418,580
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,859,598
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,278,178
Real Estate and Accumulated Depreciation, Accumulated Depreciation	88,933
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,278,178
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	88,933
Operating Properties [Member] | 16330 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,540,109
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,524,625
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,966,472
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,098,262
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,064,734
Real Estate and Accumulated Depreciation, Accumulated Depreciation	204,640
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,064,734
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	204,640
Operating Properties [Member] | 16405 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	438,853
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,030,396
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	506,207
Real Estate and Accumulated Depreciation, Carrying Amount of Land	438,853
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,536,603
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,975,456
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,604,732
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,975,456
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,604,732
Operating Properties [Member] | 16420 West Hardy Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	529,876
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,267,872
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	149,476
Real Estate and Accumulated Depreciation, Carrying Amount of Land	529,876
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,417,348
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,947,224
Real Estate and Accumulated Depreciation, Accumulated Depreciation	133,420
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,947,224
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	133,420
Operating Properties [Member] | 16445 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	363,339
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,509,186
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	266,552
Real Estate and Accumulated Depreciation, Carrying Amount of Land	363,339
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,775,738
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,139,077
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,200,463
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,139,077
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,200,463
Operating Properties [Member] | 1646 Rankin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	329,961
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,944,959
Real Estate and Accumulated Depreciation, Carrying Amount of Land	592,234
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,682,686
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,274,920
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,002,826
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,274,920
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,002,826
Operating Properties [Member] | 1655 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	197,226
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	935,036
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	474,198
Real Estate and Accumulated Depreciation, Carrying Amount of Land	197,226
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,409,234
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,606,460
Real Estate and Accumulated Depreciation, Accumulated Depreciation	57,052
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,606,460
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	57,052
Operating Properties [Member] | 16580 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	289,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,559,857
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,281,260
Real Estate and Accumulated Depreciation, Carrying Amount of Land	289,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,841,118
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,130,118
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,631,421
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,130,118
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,631,421
Operating Properties [Member] | 16602 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	284,403
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,953,014
Real Estate and Accumulated Depreciation, Carrying Amount of Land	503,779
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,733,638
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,237,417
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,075,204
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,237,417
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,075,204
Operating Properties [Member] | 16605 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	298,999
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,417,513
Real Estate and Accumulated Depreciation, Carrying Amount of Land	496,186
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,220,326
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,716,512
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,014,594
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,716,512
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,014,594
Operating Properties [Member] | 1665 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	452,439
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,016,585
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	57,074
Real Estate and Accumulated Depreciation, Carrying Amount of Land	452,439
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,073,658
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,526,097
Real Estate and Accumulated Depreciation, Accumulated Depreciation	81,921
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,526,097
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	81,921
Operating Properties [Member] | 16680 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	311,952
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,165,907
Real Estate and Accumulated Depreciation, Carrying Amount of Land	492,869
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,984,990
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,477,859
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,028,469
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,477,859
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,028,469
Operating Properties [Member] | 16685 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	414,691
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,459,484
Real Estate and Accumulated Depreciation, Carrying Amount of Land	414,691
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,459,484
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,874,175
Real Estate and Accumulated Depreciation, Accumulated Depreciation	643,446
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,874,175
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	643,446
Operating Properties [Member] | 1755 Trans Central Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	293,534
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,036,269
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	724,255
Real Estate and Accumulated Depreciation, Carrying Amount of Land	306,147
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,747,911
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,054,058
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,217,765
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,054,058
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,217,765
Operating Properties [Member] | 4301 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	226,973
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,174,979
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	77,965
Real Estate and Accumulated Depreciation, Carrying Amount of Land	226,973
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,252,944
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,479,917
Real Estate and Accumulated Depreciation, Accumulated Depreciation	64,788
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,479,917
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	64,788
Operating Properties [Member] | 4401 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	244,240
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,412,622
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	75,463
Real Estate and Accumulated Depreciation, Carrying Amount of Land	244,240
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,488,085
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,732,325
Real Estate and Accumulated Depreciation, Accumulated Depreciation	120,514
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,732,325
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	120,514
Operating Properties [Member] | 4501 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	252,907
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,504,053
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	55,906
Real Estate and Accumulated Depreciation, Carrying Amount of Land	252,907
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,559,959
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,812,866
Real Estate and Accumulated Depreciation, Accumulated Depreciation	125,078
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,812,866
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	125,078
Operating Properties [Member] | 5200 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,519,458
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,135,548
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,649,598
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,520,074
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,784,530
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,304,604
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,575,531
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,304,604
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,575,531
Operating Properties [Member] | 5250 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,173,287
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	8,868,256
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,740,727
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,173,942
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,608,328
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,782,270
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,362,379
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,782,270
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,362,379
Operating Properties [Member] | 5500 N. Sam Houston Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,243,541
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,452,951
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,513,152
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,183,340
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,696,492
Real Estate and Accumulated Depreciation, Accumulated Depreciation	570,606
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,696,492
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	570,606
Operating Properties [Member] | 8017 Pinemont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	900,953
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,323,727
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	91,219
Real Estate and Accumulated Depreciation, Carrying Amount of Land	900,953
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,414,946
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,315,899
Real Estate and Accumulated Depreciation, Accumulated Depreciation	203,059
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,315,899
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	203,059
Operating Properties [Member] | 8272 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	530,494
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,108,626
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	255,506
Real Estate and Accumulated Depreciation, Carrying Amount of Land	530,494
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,364,132
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,894,626
Real Estate and Accumulated Depreciation, Accumulated Depreciation	191,504
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,894,626
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	191,504
Operating Properties [Member] | 8282 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	450,422
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,304,942
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	637,280
Real Estate and Accumulated Depreciation, Carrying Amount of Land	450,422
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,942,222
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,392,644
Real Estate and Accumulated Depreciation, Accumulated Depreciation	162,469
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,392,644
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	162,469
Operating Properties [Member] | 8301 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,515,862
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	26,894,221
Real Estate and Accumulated Depreciation, Carrying Amount of Land	7,083,514
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	24,326,569
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	31,410,083
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,209,471
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	31,410,083
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,209,471
Operating Properties [Member] | 850 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,893,405
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,593,197
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,849,036
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,899,861
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,435,776
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	17,335,637
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,562,574
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	17,335,637
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,562,574
Operating Properties [Member] | 860 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,399,365
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,344,650
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,579,558
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,374,012
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,949,561
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,323,573
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,490,162
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,323,573
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,490,162
Operating Properties [Member] | 8801-19 & 8821-49 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,290,001
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	15,297,141
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,023,870
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,290,002
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	17,321,010
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	19,611,012
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,164,247
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	19,611,012
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,164,247
Operating Properties [Member] | 8802-8824 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,774,995
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,364,767
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,362,915
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,775,021
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,727,655
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,502,676
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,342,008
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,502,676
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,342,008
Operating Properties [Member] | 8825-8839 N Sam Houston Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	638,453
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,258,815
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	694,831
Real Estate and Accumulated Depreciation, Carrying Amount of Land	638,477
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,953,621
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,592,098
Real Estate and Accumulated Depreciation, Accumulated Depreciation	962,028
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,592,098
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	962,028
Operating Properties [Member] | 8850-8872 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	504,317
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,878,351
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,054,230
Real Estate and Accumulated Depreciation, Carrying Amount of Land	504,341
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,932,557
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,436,898
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,467,037
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,436,898
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,467,037
Operating Properties [Member] | Liberty 11 at Central Green [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,748,348
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,388,335
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,120,319
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,016,364
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,136,683
Real Estate and Accumulated Depreciation, Accumulated Depreciation	493,289
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,136,683
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	493,289
Operating Properties [Member] | Cabot III UK1B01 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Isle of Man, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	11,888,058
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	35,003,668
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	(2,769,630)
Real Estate and Accumulated Depreciation, Carrying Amount of Land	11,185,846
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	32,936,250
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	44,122,096
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,170,109
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	44,122,096
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,170,109
Operating Properties [Member] | 1011 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Itasca, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	842,043
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	984,087
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	85,979
Real Estate and Accumulated Depreciation, Carrying Amount of Land	842,043
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,070,066
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,912,109
Real Estate and Accumulated Depreciation, Accumulated Depreciation	41,246
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,912,109
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	41,246
Operating Properties [Member] | 1035 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Itasca, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	875,172
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,071,051
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	52,042
Real Estate and Accumulated Depreciation, Carrying Amount of Land	875,172
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,123,094
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,998,266
Real Estate and Accumulated Depreciation, Accumulated Depreciation	90,707
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,998,266
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	90,707
Operating Properties [Member] | 1549 W Glenlake Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Itasca, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,339,627
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,763,288
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	184,424
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,339,627
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,947,711
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,287,338
Real Estate and Accumulated Depreciation, Accumulated Depreciation	157,326
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,287,338
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	157,326
Operating Properties [Member] | 901 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Itasca, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	866,378
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,112,616
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	46,745
Real Estate and Accumulated Depreciation, Carrying Amount of Land	866,378
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,159,361
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,025,739
Real Estate and Accumulated Depreciation, Accumulated Depreciation	82,105
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,025,739
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	82,105
Operating Properties [Member] | 925 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Itasca, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	945,251
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,010,181
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	46,316
Real Estate and Accumulated Depreciation, Carrying Amount of Land	945,251
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,056,497
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,001,748
Real Estate and Accumulated Depreciation, Accumulated Depreciation	76,319
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,001,748
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	76,319
Operating Properties [Member] | 8241 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Jessup, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,246,618
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,844,393
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	424,643
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,246,618
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,269,035
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,515,653
Real Estate and Accumulated Depreciation, Accumulated Depreciation	283,274
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,515,653
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	283,274
Operating Properties [Member] | 8242 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Jessup, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,488,746
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,072,440
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,118,340
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,488,746
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,190,780
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,679,526
Real Estate and Accumulated Depreciation, Accumulated Depreciation	385,761
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,679,526
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	385,761
Operating Properties [Member] | 8246 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Jessup, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	590,922
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,374,522
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	93,541
Real Estate and Accumulated Depreciation, Carrying Amount of Land	590,922
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,468,063
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,058,985
Real Estate and Accumulated Depreciation, Accumulated Depreciation	140,981
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,058,985
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	140,981
Operating Properties [Member] | 1305 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Kennesaw, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	808,159
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,712,959
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	613,490
Real Estate and Accumulated Depreciation, Carrying Amount of Land	808,159
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,326,449
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,134,608
Real Estate and Accumulated Depreciation, Accumulated Depreciation	319,389
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,134,608
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	319,389
Operating Properties [Member] | 1325 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Kennesaw, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,612,924
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,771,680
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,387,503
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,612,924
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,159,183
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,772,107
Real Estate and Accumulated Depreciation, Accumulated Depreciation	620,142
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,772,107
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	620,142
Operating Properties [Member] | 3600 Cobb International Bld NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Kennesaw, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	716,860
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,962,212
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	433,426
Real Estate and Accumulated Depreciation, Carrying Amount of Land	716,860
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,395,639
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,112,499
Real Estate and Accumulated Depreciation, Accumulated Depreciation	362,293
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,112,499
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	362,293
Operating Properties [Member] | Unit 1 Bear Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Kettering, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	10,849,890
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	36,219,855
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	(2,780,348)
Real Estate and Accumulated Depreciation, Carrying Amount of Land	10,209,001
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	34,080,396
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	44,289,397
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,221,467
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	44,289,397
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,221,467
Operating Properties [Member] | 151 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,218,086
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,937,866
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,834,149
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,187,900
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,802,201
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,990,101
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,179,231
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1980
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	14,990,101
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,179,231
Operating Properties [Member] | 170 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	547,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,137,400
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,612,558
Real Estate and Accumulated Depreciation, Carrying Amount of Land	458,232
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,839,526
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,297,758
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,172,026
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1980
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,297,758
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,172,026
Operating Properties [Member] | 180 South Warner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	995,393
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,781,614
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,777,007
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,777,007
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,128,905
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2009
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,777,007
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,128,905
Operating Properties [Member] | 190 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	552,200
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,162,600
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,545,816
Real Estate and Accumulated Depreciation, Carrying Amount of Land	461,909
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,798,707
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,260,616
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,231,829
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1980
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,260,616
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,231,829
Operating Properties [Member] | 2100 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,110,111
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	12,322,939
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,132,519
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,300,531
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,433,050
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,289,689
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,433,050
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,289,689
Operating Properties [Member] | 2201 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,370,895
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	15,284,223
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,413,514
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	15,241,604
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	17,655,118
Real Estate and Accumulated Depreciation, Accumulated Depreciation	6,061,755
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	17,655,118
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	6,061,755
Operating Properties [Member] | 2300 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	509,580
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,057,624
Real Estate and Accumulated Depreciation, Carrying Amount of Land	574,152
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,993,052
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,567,204
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,541,908
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,567,204
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,541,908
Operating Properties [Member] | 2301 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,645,246
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	30,080,438
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,581,649
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	27,144,035
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	31,725,684
Real Estate and Accumulated Depreciation, Accumulated Depreciation	10,753,365
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	31,725,684
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	10,753,365
Operating Properties [Member] | 2500 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	509,580
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,663,076
Real Estate and Accumulated Depreciation, Carrying Amount of Land	592,886
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,579,770
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,172,656
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,236,260
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,172,656
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,236,260
Operating Properties [Member] | 2520 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,020,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,649,705
Real Estate and Accumulated Depreciation, Carrying Amount of Land	978,402
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,691,303
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,669,705
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,406,070
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,669,705
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,406,070
Operating Properties [Member] | 2560 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	607,210
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,122,044
Real Estate and Accumulated Depreciation, Carrying Amount of Land	649,792
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,079,462
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,729,254
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,433,510
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,729,254
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,433,510
Operating Properties [Member] | 2700 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	764,370
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,646,466
Real Estate and Accumulated Depreciation, Carrying Amount of Land	867,815
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,543,021
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,410,836
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,670,057
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,410,836
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,670,057
Operating Properties [Member] | 2900 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	679,440
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,503,074
Real Estate and Accumulated Depreciation, Carrying Amount of Land	774,096
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,408,418
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,182,514
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,597,991
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,182,514
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,597,991
Operating Properties [Member] | 3000 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,191,449
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,476,299
Real Estate and Accumulated Depreciation, Carrying Amount of Land	946,703
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,721,045
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,667,748
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,111,514
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,667,748
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,111,514
Operating Properties [Member] | 3100 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	601,956
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,192,852
Real Estate and Accumulated Depreciation, Carrying Amount of Land	611,436
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,183,372
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,794,808
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,008,387
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,794,808
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,008,387
Operating Properties [Member] | 3200 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	928,637
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,882,269
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,210,137
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,600,769
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,810,906
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,562,017
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,810,906
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,562,017
Operating Properties [Member] | 3400 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	776,496
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,139,068
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,537,958
Real Estate and Accumulated Depreciation, Carrying Amount of Land	776,496
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,677,025
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,453,521
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,945,285
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,453,521
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,945,285
Operating Properties [Member] | 3500 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,204,839
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,830,072
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,223,875
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,811,036
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,034,911
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,276,539
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,034,911
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,276,539
Operating Properties [Member] | 3600 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	236,432
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,856,252
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	820,449
Real Estate and Accumulated Depreciation, Carrying Amount of Land	236,432
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,676,701
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,913,133
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,127,390
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,913,133
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,127,390
Operating Properties [Member] | 3602 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	217,734
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,759,489
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	406,692
Real Estate and Accumulated Depreciation, Carrying Amount of Land	217,809
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,166,106
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,383,915
Real Estate and Accumulated Depreciation, Accumulated Depreciation	990,639
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,383,915
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	990,639
Operating Properties [Member] | 3604 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	397,178
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,836,269
Real Estate and Accumulated Depreciation, Carrying Amount of Land	350,874
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,882,573
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,233,447
Real Estate and Accumulated Depreciation, Accumulated Depreciation	894,044
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,233,447
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	894,044
Operating Properties [Member] | 440 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	717,001
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,816,121
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,824,138
Real Estate and Accumulated Depreciation, Carrying Amount of Land	717,001
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,640,259
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,357,260
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,859,492
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,357,260
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,859,492
Operating Properties [Member] | 460 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	705,317
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,737,487
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,227,341
Real Estate and Accumulated Depreciation, Carrying Amount of Land	705,317
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,964,828
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,670,145
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,739,395
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,670,145
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,739,395
Operating Properties [Member] | 650 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	952,911
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,722,830
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,145,922
Real Estate and Accumulated Depreciation, Carrying Amount of Land	952,911
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,868,752
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,821,663
Real Estate and Accumulated Depreciation, Accumulated Depreciation	7,073,206
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1971
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,821,663
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	7,073,206
Operating Properties [Member] | 680 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	952,361
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,722,830
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,217,277
Real Estate and Accumulated Depreciation, Carrying Amount of Land	952,361
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,940,107
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,892,468
Real Estate and Accumulated Depreciation, Accumulated Depreciation	6,688,897
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1971
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	14,892,468
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	6,688,897
Operating Properties [Member] | 1700 Interstate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Lakeland, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	650,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,444,220
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land	650,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,444,220
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,094,220
Real Estate and Accumulated Depreciation, Accumulated Depreciation	321,337
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,094,220
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	321,337
Operating Properties [Member] | 5801 Columbia Park Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Landover,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,187,620
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,598,346
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	182,789
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,187,620
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,781,135
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,968,755
Real Estate and Accumulated Depreciation, Accumulated Depreciation	207,464
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,968,755
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	207,464
Operating Properties [Member] | 11425 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	LaPorte, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	975,974
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,409,036
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	51,385
Real Estate and Accumulated Depreciation, Carrying Amount of Land	977,542
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,458,852
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,436,394
Real Estate and Accumulated Depreciation, Accumulated Depreciation	799,109
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,436,394
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	799,109
Operating Properties [Member] | 11503 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	LaPorte, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,561,931
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,695,493
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	237,274
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,566,047
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,928,651
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,494,698
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,191,065
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,494,698
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,191,065
Operating Properties [Member] | 640 S State Road 39 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Lebanon,IN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,612,787
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,065,552
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,213,251
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,612,787
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	19,278,803
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	20,891,590
Real Estate and Accumulated Depreciation, Accumulated Depreciation	872,383
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	20,891,590
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	872,383
Operating Properties [Member] | 7528 Walker Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Lehigh, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	893,441
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,510,457
Real Estate and Accumulated Depreciation, Carrying Amount of Land	779,330
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,624,568
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,403,898
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,808,110
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,403,898
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,808,110
Operating Properties [Member] | 8301 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Lehigh, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	11,249,550
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	45,456,591
Real Estate and Accumulated Depreciation, Carrying Amount of Land	11,254,716
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	45,451,425
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	56,706,141
Real Estate and Accumulated Depreciation, Accumulated Depreciation	10,329,485
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	56,706,141
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	10,329,485
Operating Properties [Member] | 8500 Willard Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Lehigh, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	2,008,569
Real Estate and Accumulated Depreciation, Initial Cost of Land	6,398,815
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	21,928,341
Real Estate and Accumulated Depreciation, Carrying Amount of Land	7,734,826
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	20,592,330
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	28,327,156
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,602,697
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	28,327,156
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,602,697
Operating Properties [Member] | 875 Maxham Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Lithia Springs, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	445,493
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,160,616
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	558,420
Real Estate and Accumulated Depreciation, Carrying Amount of Land	445,493
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,719,036
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,164,529
Real Estate and Accumulated Depreciation, Accumulated Depreciation	451,773
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,164,529
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	451,773
Operating Properties [Member] | 7533 Industrial Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Lower Macungie, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,603,460
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,807,987
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,434,039
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,603,460
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	21,242,026
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	26,845,486
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,675,692
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	26,845,486
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,675,692
Operating Properties [Member] | 1 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,600,000
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,322,449
Real Estate and Accumulated Depreciation, Carrying Amount of Land	406,421
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,916,028
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,322,449
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,920,320
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,322,449
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,920,320
Operating Properties [Member] | 1 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	419,460
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,792,570
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,457,280
Real Estate and Accumulated Depreciation, Carrying Amount of Land	419,460
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,249,850
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,669,310
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,184,617
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,669,310
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,184,617
Operating Properties [Member] | 10 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	823,540
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,341,376
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	459,973
Real Estate and Accumulated Depreciation, Carrying Amount of Land	832,244
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,792,645
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,624,889
Real Estate and Accumulated Depreciation, Accumulated Depreciation	661,691
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,624,889
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	661,691
Operating Properties [Member] | 10 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	509,075
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,699,241
Real Estate and Accumulated Depreciation, Carrying Amount of Land	509,899
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,698,417
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,208,316
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,859,067
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,208,316
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,859,067
Operating Properties [Member] | 10, 20 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	724,058
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,944,127
Real Estate and Accumulated Depreciation, Carrying Amount of Land	724,846
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,943,339
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,668,185
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,677,124
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,668,185
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,677,124
Operating Properties [Member] | 100 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,320,625
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,509,345
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,977,935
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,852,035
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,829,970
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,504,664
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,829,970
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,504,664
Operating Properties [Member] | 1001 Cedar Hollow Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,436,814
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	16,319,176
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,676,470
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	16,079,520
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	17,755,990
Real Estate and Accumulated Depreciation, Accumulated Depreciation	8,046,092
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	17,755,990
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	8,046,092
Operating Properties [Member] | 11 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	496,297
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,962,685
Real Estate and Accumulated Depreciation, Carrying Amount of Land	708,331
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,750,651
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,458,982
Real Estate and Accumulated Depreciation, Accumulated Depreciation	956,089
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,458,982
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	956,089
Operating Properties [Member] | 11,15 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,837,050
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	14,960,110
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,837,878
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,959,282
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	16,797,160
Real Estate and Accumulated Depreciation, Accumulated Depreciation	11,823,804
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	16,797,160
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	11,823,804
Operating Properties [Member] | 12,14,16 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	130,689
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,326,294
Real Estate and Accumulated Depreciation, Carrying Amount of Land	128,767
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,328,216
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,456,983
Real Estate and Accumulated Depreciation, Accumulated Depreciation	943,797
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,456,983
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	943,797
Operating Properties [Member] | 14 Lee Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	664,282
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,829,707
Real Estate and Accumulated Depreciation, Carrying Amount of Land	643,892
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,850,097
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,493,989
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,799,033
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,493,989
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,799,033
Operating Properties [Member] | 155 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	625,147
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,640,082
Real Estate and Accumulated Depreciation, Carrying Amount of Land	626,068
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,639,161
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,265,229
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,021,418
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1981
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,265,229
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,021,418
Operating Properties [Member] | 18 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	394,036
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,976,221
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	68,969
Real Estate and Accumulated Depreciation, Carrying Amount of Land	397,293
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,041,933
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,439,226
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,604,030
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1980
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,439,226
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,604,030
Operating Properties [Member] | 2 West Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,405,041
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	11,905,100
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,405,042
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,905,099
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	17,310,141
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,553,154
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	17,310,141
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,553,154
Operating Properties [Member] | 20 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	465,539
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,376,881
Real Estate and Accumulated Depreciation, Carrying Amount of Land	466,413
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,376,007
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,842,420
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,639,774
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,842,420
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,639,774
Operating Properties [Member] | 200 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	495,893
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,739,093
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	692,113
Real Estate and Accumulated Depreciation, Carrying Amount of Land	812,745
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,114,354
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,927,099
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,480,908
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,927,099
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,480,908
Operating Properties [Member] | 257-275 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	504,611
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,074,448
Real Estate and Accumulated Depreciation, Carrying Amount of Land	505,458
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,073,601
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,579,059
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,594,060
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,579,059
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,594,060
Operating Properties [Member] | 27-43 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	448,775
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,409,325
Real Estate and Accumulated Depreciation, Carrying Amount of Land	449,447
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,408,653
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,858,100
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,890,813
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1977
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,858,100
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,890,813
Operating Properties [Member] | 277-293 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	530,729
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,341,016
Real Estate and Accumulated Depreciation, Carrying Amount of Land	531,534
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,340,211
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,871,745
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,602,008
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,871,745
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,602,008
Operating Properties [Member] | 3 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	814,278
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,142,433
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,128,881
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,827,830
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,956,711
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,009,687
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,956,711
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,009,687
Operating Properties [Member] | 30 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	128,126
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	578,846
Real Estate and Accumulated Depreciation, Carrying Amount of Land	128,783
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	578,189
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	706,972
Real Estate and Accumulated Depreciation, Accumulated Depreciation	404,423
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	706,972
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	404,423
Operating Properties [Member] | 300 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	368,626
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,483,233
Real Estate and Accumulated Depreciation, Carrying Amount of Land	374,497
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,477,362
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,851,859
Real Estate and Accumulated Depreciation, Accumulated Depreciation	919,452
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,851,859
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	919,452
Operating Properties [Member] | 300-400 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	937,212
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,299,779
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,402,795
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,834,196
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,236,991
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,943,609
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,236,991
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,943,609
Operating Properties [Member] | 311 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	397,131
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,710,506
Real Estate and Accumulated Depreciation, Carrying Amount of Land	397,948
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,709,689
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,107,637
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,874,760
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,107,637
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,874,760
Operating Properties [Member] | 333 Phoenixville Pike [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	523,530
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,708,843
Real Estate and Accumulated Depreciation, Carrying Amount of Land	524,230
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,708,143
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,232,373
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,402,798
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,232,373
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,402,798
Operating Properties [Member] | 375 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	191,114
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,625,516
Real Estate and Accumulated Depreciation, Carrying Amount of Land	234,922
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,581,708
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,816,630
Real Estate and Accumulated Depreciation, Accumulated Depreciation	682,324
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,816,630
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	682,324
Operating Properties [Member] | 40 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,241,137
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	17,737,090
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,964,825
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,241,167
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	20,701,884
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	24,943,051
Real Estate and Accumulated Depreciation, Accumulated Depreciation	8,848,962
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	24,943,051
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	8,848,962
Operating Properties [Member] | 40 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	322,918
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,325,030
Real Estate and Accumulated Depreciation, Carrying Amount of Land	325,775
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,322,173
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,647,948
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,596,173
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,647,948
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,596,173
Operating Properties [Member] | 420 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,054,418
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,897,631
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,055,243
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,896,806
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,952,049
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,686,877
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,952,049
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,686,877
Operating Properties [Member] | 425 Old Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,847,501
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	44,772,891
Real Estate and Accumulated Depreciation, Carrying Amount of Land	9,953,208
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	38,667,184
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	48,620,392
Real Estate and Accumulated Depreciation, Accumulated Depreciation	335,169
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	48,620,392
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	335,169
Operating Properties [Member] | 425 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	191,114
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,708,623
Real Estate and Accumulated Depreciation, Carrying Amount of Land	321,473
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,578,264
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,899,737
Real Estate and Accumulated Depreciation, Accumulated Depreciation	716,843
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,899,737
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	716,843
Operating Properties [Member] | 45 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,380,221
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	15,322,821
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,749,748
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,953,294
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	19,703,042
Real Estate and Accumulated Depreciation, Accumulated Depreciation	7,549,963
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	19,703,042
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	7,549,963
Operating Properties [Member] | 45-67 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	795,143
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,811,065
Real Estate and Accumulated Depreciation, Carrying Amount of Land	795,831
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,810,377
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,606,208
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,085,878
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1974
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,606,208
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,085,878
Operating Properties [Member] | 5 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	785,168
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,678,632
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	220,136
Real Estate and Accumulated Depreciation, Carrying Amount of Land	786,235
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,897,701
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,683,936
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,663,371
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,683,936
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,663,371
Operating Properties [Member] | 5 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	684,200
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,181,661
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,261,679
Real Estate and Accumulated Depreciation, Carrying Amount of Land	684,200
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,443,340
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,127,540
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,617,433
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,127,540
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,617,433
Operating Properties [Member] | 50 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	849,576
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	14,095,935
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,337,076
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,608,435
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,945,511
Real Estate and Accumulated Depreciation, Accumulated Depreciation	6,831,325
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	14,945,511
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	6,831,325
Operating Properties [Member] | 50 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	323,971
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,100,515
Real Estate and Accumulated Depreciation, Carrying Amount of Land	323,792
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,100,694
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,424,486
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,605,810
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,424,486
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,605,810
Operating Properties [Member] | 500 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	472,364
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,162,401
Real Estate and Accumulated Depreciation, Carrying Amount of Land	762,370
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,872,395
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,634,765
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,748,571
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,634,765
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,748,571
Operating Properties [Member] | 508 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	331,392
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,661,431
Real Estate and Accumulated Depreciation, Carrying Amount of Land	332,216
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,660,607
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,992,823
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,174,148
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,992,823
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,174,148
Operating Properties [Member] | 510 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	356,950
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	926,587
Real Estate and Accumulated Depreciation, Carrying Amount of Land	357,751
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	925,786
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,283,537
Real Estate and Accumulated Depreciation, Accumulated Depreciation	745,524
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,283,537
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	745,524
Operating Properties [Member] | 55 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	215,005
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,674,159
Real Estate and Accumulated Depreciation, Carrying Amount of Land	215,818
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,673,346
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,889,164
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,077,100
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,889,164
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,077,100
Operating Properties [Member] | 60 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	865,424
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,285,000
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,182,805
Real Estate and Accumulated Depreciation, Carrying Amount of Land	884,974
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,448,255
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,333,229
Real Estate and Accumulated Depreciation, Accumulated Depreciation	9,348,321
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,333,229
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	9,348,321
Operating Properties [Member] | 600 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,013,750
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,218,329
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,798,565
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,433,514
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,232,079
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,134,849
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,232,079
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,134,849
Operating Properties [Member] | 65 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	381,544
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,371,688
Real Estate and Accumulated Depreciation, Carrying Amount of Land	382,361
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,370,871
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,753,232
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,287,217
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,753,232
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,287,217
Operating Properties [Member] | 7 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	176,435
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,966,060
Real Estate and Accumulated Depreciation, Carrying Amount of Land	177,317
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,965,178
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,142,495
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,382,814
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,142,495
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,382,814
Operating Properties [Member] | 700 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,013,750
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,957,984
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,785,823
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,185,911
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,971,734
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,093,141
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,971,734
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,093,141
Operating Properties [Member] | 75 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	143,074
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	618,372
Real Estate and Accumulated Depreciation, Carrying Amount of Land	143,811
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	617,635
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	761,446
Real Estate and Accumulated Depreciation, Accumulated Depreciation	517,897
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1977
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	761,446
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	517,897
Operating Properties [Member] | 77-123 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	887,664
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,415,601
Real Estate and Accumulated Depreciation, Carrying Amount of Land	888,359
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,414,906
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,303,265
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,973,746
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,303,265
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,973,746
Operating Properties [Member] | 1169 Canton Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Marietta, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,232,219
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	17,897,326
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	435,643
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,232,219
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	18,332,969
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	19,565,188
Real Estate and Accumulated Depreciation, Accumulated Depreciation	698,307
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	19,565,188
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	698,307
Operating Properties [Member] | 65 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Mauldin, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	557,174
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,854,015
Real Estate and Accumulated Depreciation, Carrying Amount of Land	506,318
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,904,871
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,411,189
Real Estate and Accumulated Depreciation, Accumulated Depreciation	709,233
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,411,189
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	709,233
Operating Properties [Member] | 75 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Mauldin, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	419,731
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,341,542
Real Estate and Accumulated Depreciation, Carrying Amount of Land	430,909
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,330,364
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,761,273
Real Estate and Accumulated Depreciation, Accumulated Depreciation	634,095
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,761,273
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	634,095
Operating Properties [Member] | 126-132 Liberty Industrial Pkw [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	McDonough, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	600,666
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,184,131
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	543,200
Real Estate and Accumulated Depreciation, Carrying Amount of Land	600,666
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,727,330
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,327,996
Real Estate and Accumulated Depreciation, Accumulated Depreciation	319,917
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,327,996
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	319,917
Operating Properties [Member] | 95-115 Liberty Industrial Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	McDonough, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	660,420
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,785,127
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	547,148
Real Estate and Accumulated Depreciation, Carrying Amount of Land	660,420
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,332,275
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,992,695
Real Estate and Accumulated Depreciation, Accumulated Depreciation	311,978
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,992,695
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	311,978
Operating Properties [Member] | 11401 NW 134th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Medley, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,558,619
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	17,678,237
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	896,842
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,558,619
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	18,575,079
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	24,133,698
Real Estate and Accumulated Depreciation, Accumulated Depreciation	797,567
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	24,133,698
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	797,567
Operating Properties [Member] | 3824-3960 Crowfarn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Memphis, TN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	291,223
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,044,953
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	74,204
Real Estate and Accumulated Depreciation, Carrying Amount of Land	291,223
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,119,156
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,410,379
Real Estate and Accumulated Depreciation, Accumulated Depreciation	83,033
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,410,379
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	83,033
Operating Properties [Member] | 12501 & 12701 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Minnetonka, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,175,209
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,948,085
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,735,905
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,177,953
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,681,246
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,859,199
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,995,333
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	14,859,199
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,995,333
Operating Properties [Member] | 12800 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Minnetonka, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,273,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,158,737
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,090,734
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,273,731
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,249,339
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,523,070
Real Estate and Accumulated Depreciation, Accumulated Depreciation	408,984
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,523,070
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	408,984
Operating Properties [Member] | 12900 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Minnetonka, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,236,560
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,762,325
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,468,108
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,236,687
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,230,306
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,466,993
Real Estate and Accumulated Depreciation, Accumulated Depreciation	337,484
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,466,993
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	337,484
Operating Properties [Member] | 5400-5500 Feltl Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Minnetonka, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	883,895
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,983,345
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,579,074
Real Estate and Accumulated Depreciation, Carrying Amount of Land	883,895
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,562,419
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,446,314
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,883,003
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,446,314
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,883,003
Operating Properties [Member] | 6000 Clearwater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Minnetonka, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	985,016
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,091,371
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,503,007
Real Estate and Accumulated Depreciation, Carrying Amount of Land	985,117
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,594,277
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,579,394
Real Estate and Accumulated Depreciation, Accumulated Depreciation	439,175
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,579,394
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	439,175
Operating Properties [Member] | 456 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Minooka, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,862,683
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,357,981
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,801,914
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,862,683
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	19,159,895
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	23,022,578
Real Estate and Accumulated Depreciation, Accumulated Depreciation	792,052
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	23,022,578
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	792,052
Operating Properties [Member] | 3100 SW 145th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Miramar, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	6,204,407
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	16,723,386
Real Estate and Accumulated Depreciation, Carrying Amount of Land	6,265,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	16,662,793
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	22,927,793
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,643,402
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	22,927,793
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,643,402
Operating Properties [Member] | 3350 SW 148th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Miramar, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,960,511
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	17,616,594
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,980,689
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	17,596,416
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	20,577,105
Real Estate and Accumulated Depreciation, Accumulated Depreciation	6,988,133
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	20,577,105
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	6,988,133
Operating Properties [Member] | 3400 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Miramar, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,022,153
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,345,881
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,116,685
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,022,153
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,462,566
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,484,719
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,734,572
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,484,719
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,734,572
Operating Properties [Member] | 3450 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Miramar, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,022,152
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,357,143
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,408,674
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,022,152
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,765,817
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	16,787,969
Real Estate and Accumulated Depreciation, Accumulated Depreciation	6,526,825
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	16,787,969
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	6,526,825
Operating Properties [Member] | 21 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Monroe Township, NJ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,097,170
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,715,401
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	560,312
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,097,170
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,275,713
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,372,883
Real Estate and Accumulated Depreciation, Accumulated Depreciation	495,630
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,372,883
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	495,630
Operating Properties [Member] | 4 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Monroe Township, NJ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,263,153
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,261,759
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	599,026
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,263,153
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,860,785
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,123,938
Real Estate and Accumulated Depreciation, Accumulated Depreciation	475,968
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,123,938
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	475,968
Operating Properties [Member] | 22750 Cactus Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Moreno Valley, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	9,404,283
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,380,934
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,851,865
Real Estate and Accumulated Depreciation, Carrying Amount of Land	9,408,276
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	26,228,806
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	35,637,082
Real Estate and Accumulated Depreciation, Accumulated Depreciation	490,170
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	35,637,082
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	490,170
Operating Properties [Member] | 323 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Morrisville, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	2,534,078
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,071,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,397,807
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,028,987
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,071,600
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,426,794
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,498,394
Real Estate and Accumulated Depreciation, Accumulated Depreciation	902,673
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,498,394
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	902,673
Operating Properties [Member] | 324 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Morrisville, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,449,092
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,424,932
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	321,760
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,449,450
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,746,334
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,195,784
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,005,152
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,195,784
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,005,152
Operating Properties [Member] | 619 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Morrisville, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,031,430
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,655,167
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	226,631
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,031,685
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,881,543
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,913,228
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,176,421
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,913,228
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,176,421
Operating Properties [Member] | 627 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Morrisville, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,061,370
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,152,110
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	595,652
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,061,632
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,747,500
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,809,132
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,220,446
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,809,132
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,220,446
Operating Properties [Member] | 701 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Morrisville, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,300,889
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,313,226
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	207,184
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,301,211
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,520,088
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,821,299
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,123,136
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,821,299
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,123,136
Operating Properties [Member] | 220 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Newark, DE
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	566,650
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,099,337
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	782,233
Real Estate and Accumulated Depreciation, Carrying Amount of Land	566,650
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,881,570
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,448,220
Real Estate and Accumulated Depreciation, Accumulated Depreciation	287,917
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,448,220
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	287,917
Operating Properties [Member] | 222 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Newark, DE
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,045,238
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,975,553
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	149,013
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,045,238
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,124,565
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,169,803
Real Estate and Accumulated Depreciation, Accumulated Depreciation	122,058
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,169,803
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	122,058
Operating Properties [Member] | 1879 Lamont Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Odenton, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,976,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	8,099,579
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,469,160
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,011,030
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,533,709
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,544,739
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,155,743
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,544,739
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,155,743
Operating Properties [Member] | 350 Winmeyer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Odenton, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,778,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,289,165
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,074,288
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,809,927
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,331,926
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,141,853
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,561,604
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,141,853
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,561,604
Operating Properties [Member] | 4000 E Airport Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Ontario, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,686,533
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,125,772
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	408,877
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,686,533
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,534,649
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,221,182
Real Estate and Accumulated Depreciation, Accumulated Depreciation	437,422
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,221,182
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	437,422
Operating Properties [Member] | 1000 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	415,906
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,824,930
Real Estate and Accumulated Depreciation, Carrying Amount of Land	435,400
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,805,436
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,240,836
Real Estate and Accumulated Depreciation, Accumulated Depreciation	500,344
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,240,836
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	500,344
Operating Properties [Member] | 10003 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	680,312
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,120,754
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,343,847
Real Estate and Accumulated Depreciation, Carrying Amount of Land	680,312
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,464,601
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,144,913
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,132,887
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,144,913
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,132,887
Operating Properties [Member] | 10511 & 10611 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	517,554
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,568,186
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	692,668
Real Estate and Accumulated Depreciation, Carrying Amount of Land	522,991
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,255,417
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,778,408
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,390,788
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,778,408
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,390,788
Operating Properties [Member] | 10771 Palm Bay Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	664,605
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,513,013
Real Estate and Accumulated Depreciation, Carrying Amount of Land	685,383
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,492,235
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,177,618
Real Estate and Accumulated Depreciation, Accumulated Depreciation	768,667
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,177,618
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	768,667
Operating Properties [Member] | 1090 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	878,320
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,558,833
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,438,037
Real Estate and Accumulated Depreciation, Carrying Amount of Land	878,320
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,996,870
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,875,190
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,142,230
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,875,190
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,142,230
Operating Properties [Member] | 1400-1440 Central Florida Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	518,043
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,561,938
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	976,217
Real Estate and Accumulated Depreciation, Carrying Amount of Land	518,043
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,538,155
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,056,198
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,542,263
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1962
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,056,198
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,542,263
Operating Properties [Member] | 1902 Cypress Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	523,512
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,191,790
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,515,373
Real Estate and Accumulated Depreciation, Carrying Amount of Land	538,512
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,692,163
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,230,675
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,952,861
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,230,675
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,952,861
Operating Properties [Member] | 2000 Park Oaks Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	913,201
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,818,610
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	241,819
Real Estate and Accumulated Depreciation, Carrying Amount of Land	913,201
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,060,429
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,973,630
Real Estate and Accumulated Depreciation, Accumulated Depreciation	311,083
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,973,630
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	311,083
Operating Properties [Member] | 2202 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,283,713
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,181,368
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,283,713
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,181,368
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,465,081
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,501,397
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,465,081
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,501,397
Operating Properties [Member] | 2212 Taft Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	467,296
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,855,024
Real Estate and Accumulated Depreciation, Carrying Amount of Land	825,673
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,496,647
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,322,320
Real Estate and Accumulated Depreciation, Accumulated Depreciation	656,682
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,322,320
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	656,682
Operating Properties [Member] | 2256 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,261,924
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,496,249
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,545,018
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,271,785
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,031,406
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,303,191
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,860,842
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,303,191
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,860,842
Operating Properties [Member] | 2351 Investors Row [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	385,964
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,215,820
Real Estate and Accumulated Depreciation, Carrying Amount of Land	642,427
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,959,357
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,601,784
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,053,814
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,601,784
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,053,814
Operating Properties [Member] | 2400 South Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,236,819
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,243,314
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	708,578
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,244,667
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,944,044
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,188,711
Real Estate and Accumulated Depreciation, Accumulated Depreciation	268,566
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,188,711
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	268,566
Operating Properties [Member] | 2412 Sand Lake Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	535,964
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,830,135
Real Estate and Accumulated Depreciation, Carrying Amount of Land	704,800
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,661,299
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,366,099
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,020,666
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,366,099
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,020,666
Operating Properties [Member] | 2416 Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,435,301
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,174,642
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	694,147
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,435,301
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,868,789
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,304,090
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,568,189
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,304,090
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,568,189
Operating Properties [Member] | 6200 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	903,701
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,660,760
Real Estate and Accumulated Depreciation, Carrying Amount of Land	925,671
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,638,790
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,564,461
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,886,420
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,564,461
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,886,420
Operating Properties [Member] | 6501 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	872,550
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,526,043
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	283,738
Real Estate and Accumulated Depreciation, Carrying Amount of Land	872,550
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,809,781
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,682,331
Real Estate and Accumulated Depreciation, Accumulated Depreciation	132,760
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,682,331
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	132,760
Operating Properties [Member] | 6918 Presidents Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	903,701
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,790,427
Real Estate and Accumulated Depreciation, Carrying Amount of Land	830,953
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,863,175
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,694,128
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,001,454
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,694,128
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,001,454
Operating Properties [Member] | 6923 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,443,510
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,775,194
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	486,102
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,457,286
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,247,521
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,704,807
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,546,051
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,704,807
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,546,051
Operating Properties [Member] | 7022 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,431,489
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	8,002,539
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	815,640
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,445,807
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,803,861
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,249,668
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,910,017
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,249,668
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,910,017
Operating Properties [Member] | 7100 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,553,537
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,702,243
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	409,929
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,570,863
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,094,846
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,665,709
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,305,001
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,665,709
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,305,001
Operating Properties [Member] | 7101 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,931,697
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,388,203
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,052,761
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,932,004
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,440,657
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,372,661
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,137,431
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,372,661
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,137,431
Operating Properties [Member] | 7315 Kingspointe Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,295,972
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	15,564,905
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,370,731
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,295,972
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	19,935,637
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	24,231,609
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,695,236
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	24,231,609
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,695,236
Operating Properties [Member] | 8201 Chancellor Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	332,992
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,825,284
Real Estate and Accumulated Depreciation, Carrying Amount of Land	373,500
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,784,776
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,158,276
Real Estate and Accumulated Depreciation, Accumulated Depreciation	499,506
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,158,276
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	499,506
Operating Properties [Member] | 851 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	443,989
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,907,134
Real Estate and Accumulated Depreciation, Carrying Amount of Land	464,800
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,886,323
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,351,123
Real Estate and Accumulated Depreciation, Accumulated Depreciation	504,060
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,351,123
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	504,060
Operating Properties [Member] | 950 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	574,831
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,763,949
Real Estate and Accumulated Depreciation, Carrying Amount of Land	587,319
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,751,461
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,338,780
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,175,031
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,338,780
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,175,031
Operating Properties [Member] | 9550 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	252,850
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,297,923
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	141,775
Real Estate and Accumulated Depreciation, Carrying Amount of Land	252,850
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,439,698
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,692,548
Real Estate and Accumulated Depreciation, Accumulated Depreciation	587,158
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,692,548
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	587,158
Operating Properties [Member] | 9600 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	405,362
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,146,546
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	367,265
Real Estate and Accumulated Depreciation, Carrying Amount of Land	405,362
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,513,811
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,919,173
Real Estate and Accumulated Depreciation, Accumulated Depreciation	602,972
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,919,173
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	602,972
Operating Properties [Member] | 9700 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	838,853
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,084,540
Real Estate and Accumulated Depreciation, Carrying Amount of Land	767,953
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,155,440
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,923,393
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,068,841
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,923,393
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,068,841
Operating Properties [Member] | 13 Centennial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Peabody, MA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,203,464
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,752,384
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	489,439
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,203,464
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,241,823
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,445,287
Real Estate and Accumulated Depreciation, Accumulated Depreciation	564,671
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,445,287
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	564,671
Operating Properties [Member] | 1 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	567,280
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	14,532,238
Real Estate and Accumulated Depreciation, Carrying Amount of Land	347,892
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,751,626
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,099,518
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,320,612
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,099,518
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,320,612
Operating Properties [Member] | 150 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	567,531
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	13,999,552
Real Estate and Accumulated Depreciation, Carrying Amount of Land	569,349
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,997,734
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,567,083
Real Estate and Accumulated Depreciation, Accumulated Depreciation	916,894
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	14,567,083
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	916,894
Operating Properties [Member] | 3 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	214,726
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	22,969,180
Real Estate and Accumulated Depreciation, Carrying Amount of Land	417,823
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	22,766,083
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	23,183,906
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,161,332
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	23,183,906
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,161,332
Operating Properties [Member] | 4050 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	46,301
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,019,911
Real Estate and Accumulated Depreciation, Carrying Amount of Land	616,670
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,449,542
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,066,212
Real Estate and Accumulated Depreciation, Accumulated Depreciation	532,259
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,066,212
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	532,259
Operating Properties [Member] | 4300 South 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	402,673
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	34,847,713
Real Estate and Accumulated Depreciation, Carrying Amount of Land	413,030
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	34,837,356
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	35,250,386
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,791,398
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	35,250,386
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,791,398
Operating Properties [Member] | 4751 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	992,965
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	331,924
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,619,754
Real Estate and Accumulated Depreciation, Carrying Amount of Land	613,248
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,331,395
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,944,643
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,283,334
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,944,643
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,283,334
Operating Properties [Member] | 4775 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	891,892
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,534,823
Real Estate and Accumulated Depreciation, Carrying Amount of Land	366,982
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,059,733
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,426,715
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,140,706
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,426,715
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,140,706
Operating Properties [Member] | 5 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,765,341
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	75,019,430
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,897,303
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	74,887,468
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	76,784,771
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,922,424
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	76,784,771
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,922,424
Operating Properties [Member] | 8th & Walnut Streets [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	43,066,058
Real Estate and Accumulated Depreciation, Initial Cost of Land	734,275
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	45,262,758
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	45,997,033
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	45,997,033
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,390,925
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	45,997,033
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,390,925
Operating Properties [Member] | 2626 South 7th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,519,510
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,798,560
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,422,003
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,519,510
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,220,563
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,740,073
Real Estate and Accumulated Depreciation, Accumulated Depreciation	583,306
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,740,073
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	583,306
Operating Properties [Member] | 4207 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,409,908
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,680,808
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,100,202
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,410,248
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,780,670
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,190,918
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,587,802
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,190,918
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,587,802
Operating Properties [Member] | 4217 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	6,920,980
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,045,599
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,757,067
Real Estate and Accumulated Depreciation, Carrying Amount of Land	6,690,321
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,033,325
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	20,723,646
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,476,778
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	20,723,646
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,476,778
Operating Properties [Member] | 4303 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,619,964
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,675,711
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	43,651
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,619,964
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,719,362
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,339,326
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,134,793
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,339,326
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,134,793
Operating Properties [Member] | 4313 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,895,539
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,724,283
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,467,793
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,895,539
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	18,192,076
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	22,087,615
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,356,375
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	22,087,615
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,356,375
Operating Properties [Member] | 4405 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,646,318
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,697,439
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	841,102
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,646,318
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,538,541
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,184,859
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,256,929
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,184,859
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,256,929
Operating Properties [Member] | 4410 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,758,484
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,559,563
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,592,969
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,765,172
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	16,145,844
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	20,911,016
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,912,801
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	20,911,016
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,912,801
Operating Properties [Member] | 4415 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,749,957
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,667,748
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	465,844
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,749,957
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,133,592
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,883,549
Real Estate and Accumulated Depreciation, Accumulated Depreciation	976,217
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,883,549
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	976,217
Operating Properties [Member] | 4425 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	7,318,457
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,549,401
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	(413,426)
Real Estate and Accumulated Depreciation, Carrying Amount of Land	7,318,457
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	24,135,975
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	31,454,432
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,581,188
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	31,454,432
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,581,188
Operating Properties [Member] | 4435 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,910,584
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,954,020
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,166,648
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,911,045
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,120,208
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,031,253
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,223,552
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,031,253
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,223,552
Operating Properties [Member] | 4450 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,380,972
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,257,593
Real Estate and Accumulated Depreciation, Carrying Amount of Land	6,391,283
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,247,282
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,638,565
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,562,671
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	14,638,565
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,562,671
Operating Properties [Member] | 4610 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	6,539,310
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	10,331,533
Real Estate and Accumulated Depreciation, Carrying Amount of Land	6,827,288
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,043,555
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	16,870,843
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,077,725
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	16,870,843
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,077,725
Operating Properties [Member] | 4750 S. 44th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,756,307
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	8,336,400
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,190,610
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,761,587
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,521,730
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	16,283,317
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,536,167
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	16,283,317
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,536,167
Operating Properties [Member] | 563 South 63rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,523,427
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,581,705
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,217,040
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,636,070
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	22,686,102
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	28,322,172
Real Estate and Accumulated Depreciation, Accumulated Depreciation	844,574
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	28,322,172
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	844,574
Operating Properties [Member] | 9801 South 51st Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,225,839
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,059,235
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,396,072
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,225,839
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,455,307
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,681,146
Real Estate and Accumulated Depreciation, Accumulated Depreciation	510,995
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,681,146
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	510,995
Operating Properties [Member] | Cotton Center Building 18 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	11,222,938
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	15,263,279
Real Estate and Accumulated Depreciation, Carrying Amount of Land	11,318,033
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	15,168,184
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	26,486,217
Real Estate and Accumulated Depreciation, Accumulated Depreciation	844,115
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	26,486,217
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	844,115
Operating Properties [Member] | 1000 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	706,660
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,894,330
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	248,060
Real Estate and Accumulated Depreciation, Carrying Amount of Land	706,660
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,142,391
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,849,051
Real Estate and Accumulated Depreciation, Accumulated Depreciation	254,236
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,849,051
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	254,236
Operating Properties [Member] | 1901 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	555,168
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,401,789
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	379,756
Real Estate and Accumulated Depreciation, Carrying Amount of Land	555,168
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,781,545
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,336,713
Real Estate and Accumulated Depreciation, Accumulated Depreciation	306,374
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,336,713
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	306,374
Operating Properties [Member] | 1909 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	551,706
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,797,440
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	312,150
Real Estate and Accumulated Depreciation, Carrying Amount of Land	551,706
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,109,590
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,661,296
Real Estate and Accumulated Depreciation, Accumulated Depreciation	291,732
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,661,296
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	291,732
Operating Properties [Member] | 3605 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,047,996
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,218,748
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	360,013
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,047,996
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,578,760
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,626,756
Real Estate and Accumulated Depreciation, Accumulated Depreciation	408,139
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,626,756
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	408,139
Operating Properties [Member] | 3701 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	877,564
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,460,686
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	334,916
Real Estate and Accumulated Depreciation, Carrying Amount of Land	877,564
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,795,601
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,673,165
Real Estate and Accumulated Depreciation, Accumulated Depreciation	339,796
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,673,165
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	339,796
Operating Properties [Member] | 800 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	580,456
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,681,283
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	271,462
Real Estate and Accumulated Depreciation, Carrying Amount of Land	580,456
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,952,745
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,533,201
Real Estate and Accumulated Depreciation, Accumulated Depreciation	258,314
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,533,201
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	258,314
Operating Properties [Member] | 900 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	723,534
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,004,923
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	349,690
Real Estate and Accumulated Depreciation, Carrying Amount of Land	723,534
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,354,613
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,078,147
Real Estate and Accumulated Depreciation, Accumulated Depreciation	287,366
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,078,147
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	287,366
Operating Properties [Member] | 9801 80th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pleasant Prairie, WI
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,692,077
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,934,794
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	336,795
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,689,726
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,273,940
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,963,666
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,403,243
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1994
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,963,666
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,403,243
Operating Properties [Member] | 14630-14650 28th Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Plymouth, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	198,205
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,793,422
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	965,751
Real Estate and Accumulated Depreciation, Carrying Amount of Land	198,205
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,759,172
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,957,377
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,165,832
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,957,377
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,165,832
Operating Properties [Member] | 3012-3050 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,112,781
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,763,862
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	199,220
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,112,781
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,963,081
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,075,862
Real Estate and Accumulated Depreciation, Accumulated Depreciation	130,093
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,075,862
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	130,093
Operating Properties [Member] | 595 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	359,933
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,437,116
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	720,249
Real Estate and Accumulated Depreciation, Carrying Amount of Land	359,933
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,157,365
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,517,298
Real Estate and Accumulated Depreciation, Accumulated Depreciation	949,834
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,517,298
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	949,834
Operating Properties [Member] | 601 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	164,413
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	655,933
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	279,326
Real Estate and Accumulated Depreciation, Carrying Amount of Land	164,413
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	935,259
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,099,672
Real Estate and Accumulated Depreciation, Accumulated Depreciation	463,027
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,099,672
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	463,027
Operating Properties [Member] | 605 SW 16th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	310,778
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,238,324
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	421,172
Real Estate and Accumulated Depreciation, Carrying Amount of Land	310,178
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,660,096
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,970,274
Real Estate and Accumulated Depreciation, Accumulated Depreciation	703,981
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1965
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,970,274
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	703,981
Operating Properties [Member] | 1920 West Baseline Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Rialto, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	9,361,943
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	17,970,709
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	149,839
Real Estate and Accumulated Depreciation, Carrying Amount of Land	9,413,332
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	18,069,159
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	27,482,491
Real Estate and Accumulated Depreciation, Accumulated Depreciation	60,280
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	27,482,491
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	60,280
Operating Properties [Member] | 301 Hill Carter Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	659,456
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,836,010
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	159,898
Real Estate and Accumulated Depreciation, Carrying Amount of Land	659,456
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,995,908
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,655,364
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,504,321
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,655,364
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,504,321
Operating Properties [Member] | 4101-4127 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	310,854
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,279,597
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,094,160
Real Estate and Accumulated Depreciation, Carrying Amount of Land	310,854
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,373,757
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,684,611
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,641,297
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1973
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,684,611
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,641,297
Operating Properties [Member] | 4201-4261 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	693,203
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,083,493
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,937,811
Real Estate and Accumulated Depreciation, Carrying Amount of Land	693,203
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,021,304
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,714,507
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,545,615
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,714,507
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,545,615
Operating Properties [Member] | 4263-4299 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	256,203
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,549,649
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,213,314
Real Estate and Accumulated Depreciation, Carrying Amount of Land	256,203
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,762,963
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,019,166
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,149,744
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1976
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,019,166
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,149,744
Operating Properties [Member] | 4263F-N. Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	91,476
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,884,374
Real Estate and Accumulated Depreciation, Carrying Amount of Land	91,599
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,884,251
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,975,850
Real Estate and Accumulated Depreciation, Accumulated Depreciation	862,218
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,975,850
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	862,218
Operating Properties [Member] | 4301-4335 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	223,696
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,640,435
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,738,782
Real Estate and Accumulated Depreciation, Carrying Amount of Land	223,696
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,379,217
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,602,913
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,701,198
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,602,913
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,701,198
Operating Properties [Member] | 4337-4379 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	325,303
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,385,557
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,430,286
Real Estate and Accumulated Depreciation, Carrying Amount of Land	325,303
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,815,843
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,141,146
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,930,047
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1979
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,141,146
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,930,047
Operating Properties [Member] | 4401-4445 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	615,038
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,510,272
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	506,842
Real Estate and Accumulated Depreciation, Carrying Amount of Land	615,038
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,017,114
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,632,152
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,486,608
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,632,152
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,486,608
Operating Properties [Member] | 4447-4491 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	454,056
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,729,742
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	446,660
Real Estate and Accumulated Depreciation, Carrying Amount of Land	454,056
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,176,402
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,630,458
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,665,452
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,630,458
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,665,452
Operating Properties [Member] | 4501-4549 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	486,166
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,565,211
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	553,422
Real Estate and Accumulated Depreciation, Carrying Amount of Land	486,166
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,118,633
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,604,799
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,015,290
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1981
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,604,799
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,015,290
Operating Properties [Member] | 4551-4593 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	474,360
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,478,646
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	984,318
Real Estate and Accumulated Depreciation, Carrying Amount of Land	474,360
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,462,964
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,937,324
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,268,592
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,937,324
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,268,592
Operating Properties [Member] | 4601-4643 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	652,455
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,784,675
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	794,310
Real Estate and Accumulated Depreciation, Carrying Amount of Land	652,455
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,578,985
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,231,440
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,970,780
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,231,440
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,970,780
Operating Properties [Member] | 4645-4683 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	404,616
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,967,187
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	541,284
Real Estate and Accumulated Depreciation, Carrying Amount of Land	404,616
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,508,471
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,913,087
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,739,814
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,913,087
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,739,814
Operating Properties [Member] | 4717-4729 Eubank Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	449,447
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,294,697
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,230,770
Real Estate and Accumulated Depreciation, Carrying Amount of Land	452,263
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,522,651
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,974,914
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,518,602
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,974,914
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,518,602
Operating Properties [Member] | 510 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	261,961
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,110,874
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	381,903
Real Estate and Accumulated Depreciation, Carrying Amount of Land	262,210
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,492,528
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,754,738
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,179,196
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,754,738
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,179,196
Operating Properties [Member] | 520 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	486,118
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,083,582
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	703,431
Real Estate and Accumulated Depreciation, Carrying Amount of Land	486,598
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,786,533
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,273,131
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,068,460
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,273,131
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,068,460
Operating Properties [Member] | 530 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	266,883
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,599,777
Real Estate and Accumulated Depreciation, Carrying Amount of Land	334,772
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,531,888
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,866,660
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,085,121
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,866,660
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,085,121
Operating Properties [Member] | 540 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	742,300
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,415,233
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,066,839
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,090,694
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,157,533
Real Estate and Accumulated Depreciation, Accumulated Depreciation	901,938
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,157,533
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	901,938
Operating Properties [Member] | 5600-5626 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	489,941
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,592,900
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	595,652
Real Estate and Accumulated Depreciation, Carrying Amount of Land	489,941
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,188,552
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,678,493
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,923,946
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,678,493
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,923,946
Operating Properties [Member] | 5601-5659 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	705,660
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,921,067
Real Estate and Accumulated Depreciation, Carrying Amount of Land	720,100
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,906,627
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,626,727
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,395,221
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,626,727
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,395,221
Operating Properties [Member] | 5650-5674 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	644,384
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,025,480
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	353,257
Real Estate and Accumulated Depreciation, Carrying Amount of Land	644,384
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,378,737
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,023,121
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,149,329
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,023,121
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,149,329
Operating Properties [Member] | 5700 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	408,729
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,697,348
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	748,269
Real Estate and Accumulated Depreciation, Carrying Amount of Land	408,729
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,445,617
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,854,346
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,921,311
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,854,346
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,921,311
Operating Properties [Member] | 5701-5799 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	694,644
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,983,122
Real Estate and Accumulated Depreciation, Carrying Amount of Land	700,503
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,977,263
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,677,766
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,290,808
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,677,766
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,290,808
Operating Properties [Member] | 5900 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	676,661
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,988,588
Real Estate and Accumulated Depreciation, Carrying Amount of Land	687,898
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,977,351
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,665,249
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,353,402
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,665,249
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,353,402
Operating Properties [Member] | 6000 Eastport Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	872,901
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,486,258
Real Estate and Accumulated Depreciation, Carrying Amount of Land	901,666
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,457,493
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,359,159
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,273,473
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,359,159
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,273,473
Operating Properties [Member] | 2020 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Riverview, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,233,639
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,608,485
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	341,435
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,233,800
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,949,759
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,183,559
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,112,479
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,183,559
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,112,479
Operating Properties [Member] | 6530 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Rock Creek, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	305,821
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,967,815
Real Estate and Accumulated Depreciation, Carrying Amount of Land	335,061
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,938,575
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,273,636
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,973,748
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,273,636
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,973,748
Operating Properties [Member] | 6532 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Rock Creek, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	354,903
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,017,099
Real Estate and Accumulated Depreciation, Carrying Amount of Land	399,988
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,972,014
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,372,002
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,752,125
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,372,002
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,752,125
Operating Properties [Member] | 13098 George Weber Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Rogers, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	895,811
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,004,189
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	645,566
Real Estate and Accumulated Depreciation, Carrying Amount of Land	895,811
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,649,755
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,545,566
Real Estate and Accumulated Depreciation, Accumulated Depreciation	857,364
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,545,566
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	857,364
Operating Properties [Member] | 13220 Wilfred Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Rogers, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	508,532
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	11,083,540
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,396,324
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,195,748
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,592,072
Real Estate and Accumulated Depreciation, Accumulated Depreciation	282,319
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,592,072
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	282,319
Operating Properties [Member] | 13225 Brockton Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Rogers, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,048,093
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	10,389,897
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,066,159
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,371,831
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,437,990
Real Estate and Accumulated Depreciation, Accumulated Depreciation	167,178
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,437,990
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	167,178
Operating Properties [Member] | 1070 Windham Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Romeoville, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	8,672,143
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,144,864
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	870,108
Real Estate and Accumulated Depreciation, Carrying Amount of Land	8,672,143
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	25,014,972
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	33,687,115
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,258,059
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	33,687,115
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,258,059
Operating Properties [Member] | 1550 Central Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Roselle, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,884,492
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,439,793
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	484,562
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,884,492
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,924,355
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,808,847
Real Estate and Accumulated Depreciation, Accumulated Depreciation	517,282
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,808,847
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	517,282
Operating Properties [Member] | 1135 Aviation Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	San Fernando, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,035,034
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,844,962
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	460,618
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,035,034
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,305,580
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,340,614
Real Estate and Accumulated Depreciation, Accumulated Depreciation	136,765
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,340,614
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	136,765
Operating Properties [Member] | 8715 Bollman Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Savage, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,263,237
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,633,210
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	99,509
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,263,237
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,732,719
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,995,956
Real Estate and Accumulated Depreciation, Accumulated Depreciation	116,732
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,995,956
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	116,732
Operating Properties [Member] | 8501 East Raintree Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Scottsdale, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,076,412
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	27,621,159
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,115,137
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	27,582,434
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	31,697,571
Real Estate and Accumulated Depreciation, Accumulated Depreciation	7,982,111
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	31,697,571
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	7,982,111
Operating Properties [Member] | 1150 Gateway Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Shakopee, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,126,865
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,684,178
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,126,865
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,684,178
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,811,043
Real Estate and Accumulated Depreciation, Accumulated Depreciation	320,809
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,811,043
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	320,809
Operating Properties [Member] | 5555 12th Avenue East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Shakopee, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	887,285
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,321,200
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	206,165
Real Estate and Accumulated Depreciation, Carrying Amount of Land	887,285
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,527,365
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,414,650
Real Estate and Accumulated Depreciation, Accumulated Depreciation	332,861
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,414,650
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	332,861
Operating Properties [Member] | 1210 Champion Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Sharonville, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,337,271
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,135,118
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	489,270
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,337,271
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,624,389
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,961,660
Real Estate and Accumulated Depreciation, Accumulated Depreciation	601,653
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,961,660
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	601,653
Operating Properties [Member] | 9300 Old Scotland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Shippensburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	10,232,633
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	84,019,815
Real Estate and Accumulated Depreciation, Carrying Amount of Land	13,183,027
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	81,069,421
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	94,252,448
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,152,144
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	94,252,448
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,152,144
Operating Properties [Member] | 3990 Heritage Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Simi Valley, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,964,140
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,667,267
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	345,689
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,964,140
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,012,956
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,977,096
Real Estate and Accumulated Depreciation, Accumulated Depreciation	431,004
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,977,096
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	431,004
Operating Properties [Member] | 3654-3668 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	St. Charles, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	643,639
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,645,058
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	141,970
Real Estate and Accumulated Depreciation, Carrying Amount of Land	643,639
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,787,028
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,430,667
Real Estate and Accumulated Depreciation, Accumulated Depreciation	94,498
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,430,667
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	94,498
Operating Properties [Member] | 3701 Illinois Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	St. Charles, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	672,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,288,924
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	117,765
Real Estate and Accumulated Depreciation, Carrying Amount of Land	672,500
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,406,689
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,079,189
Real Estate and Accumulated Depreciation, Accumulated Depreciation	79,036
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,079,189
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	79,036
Operating Properties [Member] | 3950-3980 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	St. Charles, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	851,080
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,027,753
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	149,571
Real Estate and Accumulated Depreciation, Carrying Amount of Land	851,080
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,177,324
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,028,404
Real Estate and Accumulated Depreciation, Accumulated Depreciation	148,467
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,028,404
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	148,467
Operating Properties [Member] | 1501 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	St. Petersburg, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	283,474
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,230,868
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	165,205
Real Estate and Accumulated Depreciation, Carrying Amount of Land	283,474
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,396,072
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,679,546
Real Estate and Accumulated Depreciation, Accumulated Depreciation	100,561
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,679,546
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	100,561
Operating Properties [Member] | 1527 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	St. Petersburg, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	374,284
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,987,226
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	207,177
Real Estate and Accumulated Depreciation, Carrying Amount of Land	374,284
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,194,403
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,568,687
Real Estate and Accumulated Depreciation, Accumulated Depreciation	133,429
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,568,687
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	133,429
Operating Properties [Member] | 1551 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	St. Petersburg, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	699,797
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,214,438
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	540,106
Real Estate and Accumulated Depreciation, Carrying Amount of Land	699,797
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,754,544
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,454,341
Real Estate and Accumulated Depreciation, Accumulated Depreciation	228,445
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,454,341
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	228,445
Operating Properties [Member] | 6900 Harbor View Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Suffolk, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	904,052
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,778,897
Real Estate and Accumulated Depreciation, Carrying Amount of Land	807,006
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,875,943
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,682,949
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,004,053
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,682,949
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,004,053
Operating Properties [Member] | 6920 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Suffolk, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	603,391
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,707,341
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,628,635
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,682,097
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,310,732
Real Estate and Accumulated Depreciation, Accumulated Depreciation	383,147
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,310,732
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	383,147
Operating Properties [Member] | 6950 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Suffolk, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	929,844
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,499,290
Real Estate and Accumulated Depreciation, Carrying Amount of Land	794,848
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,634,286
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,429,134
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,539,151
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,429,134
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,539,151
Operating Properties [Member] | 1516 Fryar Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Sumner, WA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,675,402
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,079,543
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	301,095
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,675,402
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,380,638
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,056,040
Real Estate and Accumulated Depreciation, Accumulated Depreciation	289,202
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,056,040
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	289,202
Operating Properties [Member] | 1301 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Sunrise, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,100,162
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,219,956
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,125,865
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,100,791
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	31,345,192
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	36,445,983
Real Estate and Accumulated Depreciation, Accumulated Depreciation	6,226,037
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	36,445,983
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	6,226,037
Operating Properties [Member] | 13621 NW 12th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Sunrise, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,570,820
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,454,900
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,667,264
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,570,820
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,122,164
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	17,692,984
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,493,510
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	17,692,984
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,493,510
Operating Properties [Member] | 13630 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Sunrise, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	659,797
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,596,275
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	455,772
Real Estate and Accumulated Depreciation, Carrying Amount of Land	659,825
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,052,018
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,711,843
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,212,332
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1991
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,711,843
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,212,332
Operating Properties [Member] | 13650 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Sunrise, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	558,223
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,171,930
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	321,767
Real Estate and Accumulated Depreciation, Carrying Amount of Land	558,251
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,493,669
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,051,920
Real Estate and Accumulated Depreciation, Accumulated Depreciation	999,846
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1991
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,051,920
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	999,846
Operating Properties [Member] | 111 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	359,540
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,461,850
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,582,199
Real Estate and Accumulated Depreciation, Carrying Amount of Land	359,540
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,044,049
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,403,589
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,069,477
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,403,589
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,069,477
Operating Properties [Member] | 131 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	511,463
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,437,886
Real Estate and Accumulated Depreciation, Carrying Amount of Land	559,527
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,389,822
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,949,349
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,531,005
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,949,349
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,531,005
Operating Properties [Member] | 150-182 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	403,541
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,260,899
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,181,609
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,482,831
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,664,440
Real Estate and Accumulated Depreciation, Accumulated Depreciation	848,617
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,664,440
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	848,617
Operating Properties [Member] | 200-34 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	330,097
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,385,332
Real Estate and Accumulated Depreciation, Carrying Amount of Land	933,362
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,782,067
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,715,429
Real Estate and Accumulated Depreciation, Accumulated Depreciation	638,646
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,715,429
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	638,646
Operating Properties [Member] | 3102,3104,3110 Cherry Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	503,767
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,787,585
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,308,846
Real Estate and Accumulated Depreciation, Carrying Amount of Land	503,767
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,096,431
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,600,198
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,982,773
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,600,198
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,982,773
Operating Properties [Member] | 3401-3409 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	556,952
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,849,236
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,948
Real Estate and Accumulated Depreciation, Carrying Amount of Land	556,952
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,852,184
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,409,136
Real Estate and Accumulated Depreciation, Accumulated Depreciation	203,074
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,409,136
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	203,074
Operating Properties [Member] | 3502 Roga Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	201,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,263,131
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	50,142
Real Estate and Accumulated Depreciation, Carrying Amount of Land	201,600
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,313,273
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,514,873
Real Estate and Accumulated Depreciation, Accumulated Depreciation	70,591
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,514,873
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	70,591
Operating Properties [Member] | 3505 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	936,336
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,155,520
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,313
Real Estate and Accumulated Depreciation, Carrying Amount of Land	936,336
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,156,833
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,093,169
Real Estate and Accumulated Depreciation, Accumulated Depreciation	413,118
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,093,169
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	413,118
Operating Properties [Member] | 3608 Queen Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	650,384
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,764,301
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	32,287
Real Estate and Accumulated Depreciation, Carrying Amount of Land	650,384
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,796,588
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,446,972
Real Estate and Accumulated Depreciation, Accumulated Depreciation	262,219
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,446,972
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	262,219
Operating Properties [Member] | 4502 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,035,422
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,547,955
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,071,535
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,511,842
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,583,377
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,386,489
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,583,377
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,386,489
Operating Properties [Member] | 4503 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	619,913
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,751,187
Real Estate and Accumulated Depreciation, Carrying Amount of Land	619,913
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,751,187
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,371,100
Real Estate and Accumulated Depreciation, Accumulated Depreciation	925,297
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,371,100
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	925,297
Operating Properties [Member] | 4505 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	516,594
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,443,438
Real Estate and Accumulated Depreciation, Carrying Amount of Land	716,594
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,243,438
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,960,032
Real Estate and Accumulated Depreciation, Accumulated Depreciation	864,064
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,960,032
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	864,064
Operating Properties [Member] | 4508 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	498,598
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,307,705
Real Estate and Accumulated Depreciation, Carrying Amount of Land	556,887
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,249,416
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,806,303
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,221,367
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,806,303
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,221,367
Operating Properties [Member] | 4511 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	516,594
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,311,508
Real Estate and Accumulated Depreciation, Carrying Amount of Land	686,594
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,141,508
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,828,102
Real Estate and Accumulated Depreciation, Accumulated Depreciation	718,070
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,828,102
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	718,070
Operating Properties [Member] | 4520 Seedling Circle [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	854,797
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	42,131
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,773,264
Real Estate and Accumulated Depreciation, Carrying Amount of Land	854,797
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,815,395
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,670,192
Real Estate and Accumulated Depreciation, Accumulated Depreciation	745,181
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,670,192
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	745,181
Operating Properties [Member] | 4630 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	943,169
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	14,177,882
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,560,099
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,560,952
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,121,051
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,177,038
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,121,051
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,177,038
Operating Properties [Member] | 4631 Woodland Corporate Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,453,367
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	13,806,242
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,908,792
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,350,817
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,259,609
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,062,168
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,259,609
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,062,168
Operating Properties [Member] | 501 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	898,884
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,438,023
Real Estate and Accumulated Depreciation, Carrying Amount of Land	900,508
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,436,399
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,336,907
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,056,691
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,336,907
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,056,691
Operating Properties [Member] | 5250 Eagle Trail Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	952,860
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,472,043
Real Estate and Accumulated Depreciation, Carrying Amount of Land	952,860
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,472,043
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,424,903
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,409,987
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,424,903
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,409,987
Operating Properties [Member] | 5501-5519 Pioneer Park Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	162,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,613,000
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	974,528
Real Estate and Accumulated Depreciation, Carrying Amount of Land	262,416
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,487,112
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,749,528
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,199,849
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1981
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,749,528
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,199,849
Operating Properties [Member] | 5690-5694 Crenshaw Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	181,923
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,812,496
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,024,573
Real Estate and Accumulated Depreciation, Carrying Amount of Land	181,923
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,837,069
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,018,992
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,089,555
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1979
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,018,992
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,089,555
Operating Properties [Member] | 701-725 South US Hwy 301 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	419,683
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,932,756
Real Estate and Accumulated Depreciation, Carrying Amount of Land	661,680
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,690,759
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,352,439
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,389,384
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,352,439
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,389,384
Operating Properties [Member] | 7621 Bald Cypress Place (Bldg N) [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	716,580
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	132,773
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	605,762
Real Estate and Accumulated Depreciation, Carrying Amount of Land	447,498
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,007,617
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,455,115
Real Estate and Accumulated Depreciation, Accumulated Depreciation	287,125
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,455,115
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	287,125
Operating Properties [Member] | 7724 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	235,893
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,247,071
Real Estate and Accumulated Depreciation, Carrying Amount of Land	235,894
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,247,070
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,482,964
Real Estate and Accumulated Depreciation, Accumulated Depreciation	850,183
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,482,964
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	850,183
Operating Properties [Member] | 7725 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	553,335
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,723,937
Real Estate and Accumulated Depreciation, Carrying Amount of Land	771,501
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,505,771
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,277,272
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,280,776
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,277,272
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,280,776
Operating Properties [Member] | 7802-50 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	357,364
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,061,920
Real Estate and Accumulated Depreciation, Carrying Amount of Land	506,949
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,912,335
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,419,284
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,069,963
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,419,284
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,069,963
Operating Properties [Member] | 7851-7861 Woodland Center Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	548,905
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,241,627
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	273,640
Real Estate and Accumulated Depreciation, Carrying Amount of Land	548,905
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,515,267
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,064,172
Real Estate and Accumulated Depreciation, Accumulated Depreciation	603,840
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,064,172
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	603,840
Operating Properties [Member] | 7852-98 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	357,364
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,773,785
Real Estate and Accumulated Depreciation, Carrying Amount of Land	506,949
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,624,200
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,131,149
Real Estate and Accumulated Depreciation, Accumulated Depreciation	934,043
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,131,149
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	934,043
Operating Properties [Member] | 7920 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,082,648
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,445,444
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	434,554
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,082,648
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,879,998
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,962,646
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,134,463
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,962,646
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,134,463
Operating Properties [Member] | 7930, 8010-20 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,408,478
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,247,246
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,124,428
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,408,478
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,371,674
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,780,152
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,846,537
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,780,152
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,846,537
Operating Properties [Member] | 8001 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	350,406
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,298,881
Real Estate and Accumulated Depreciation, Carrying Amount of Land	438,061
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,211,226
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,649,287
Real Estate and Accumulated Depreciation, Accumulated Depreciation	862,026
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,649,287
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	862,026
Operating Properties [Member] | 8110 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	912,663
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,425,143
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	261,295
Real Estate and Accumulated Depreciation, Carrying Amount of Land	912,663
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,686,438
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,599,101
Real Estate and Accumulated Depreciation, Accumulated Depreciation	310,710
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,599,101
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	310,710
Operating Properties [Member] | 8112-42 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	513,263
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,230,239
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	649,274
Real Estate and Accumulated Depreciation, Carrying Amount of Land	513,263
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,879,513
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,392,776
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,910,874
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,392,776
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,910,874
Operating Properties [Member] | 8130 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	655,668
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,132,076
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	63,891
Real Estate and Accumulated Depreciation, Carrying Amount of Land	655,668
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,195,967
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,851,635
Real Estate and Accumulated Depreciation, Accumulated Depreciation	267,542
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,851,635
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	267,542
Operating Properties [Member] | 8154-8198 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	399,088
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,868,834
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	899,472
Real Estate and Accumulated Depreciation, Carrying Amount of Land	399,088
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,768,306
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,167,394
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,627,975
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,167,394
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,627,975
Operating Properties [Member] | 8212 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	820,882
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,322,720
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	488,973
Real Estate and Accumulated Depreciation, Carrying Amount of Land	820,882
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,811,693
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,632,575
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,045,591
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,632,575
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,045,591
Operating Properties [Member] | 8401-8408 Benjamin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	789,651
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,454,648
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	301,268
Real Estate and Accumulated Depreciation, Carrying Amount of Land	611,626
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,933,941
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,545,567
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,599,279
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,545,567
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,599,279
Operating Properties [Member] | 8705 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,303,870
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,688,409
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	306,814
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,304,102
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	23,994,992
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	28,299,094
Real Estate and Accumulated Depreciation, Accumulated Depreciation	6,074,130
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	28,299,094
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	6,074,130
Operating Properties [Member] | 8715 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,343,910
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,325,599
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	487,389
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,344,090
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	18,812,808
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	22,156,898
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,458,387
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	22,156,898
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,458,387
Operating Properties [Member] | 8725 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,167,787
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	19,126,318
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	632,200
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,167,958
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	19,758,347
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	22,926,305
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,503,373
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	22,926,305
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,503,373
Operating Properties [Member] | 8735 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,166,130
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,735,573
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,292,137
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,166,300
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	20,027,540
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	23,193,840
Real Estate and Accumulated Depreciation, Accumulated Depreciation	5,508,513
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	23,193,840
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	5,508,513
Operating Properties [Member] | 8745 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,050,439
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,173,008
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	93,869
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,050,548
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,266,768
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,317,316
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,293,301
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,317,316
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,293,301
Operating Properties [Member] | 8900-34 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	537,194
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,962,378
Real Estate and Accumulated Depreciation, Carrying Amount of Land	978,019
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,521,553
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,499,572
Real Estate and Accumulated Depreciation, Accumulated Depreciation	951,035
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,499,572
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	951,035
Operating Properties [Member] | 8921 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	224,369
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,063,882
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	939,473
Real Estate and Accumulated Depreciation, Carrying Amount of Land	254,493
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,973,231
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,227,724
Real Estate and Accumulated Depreciation, Accumulated Depreciation	777,596
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,227,724
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	777,596
Operating Properties [Member] | 9001-9015 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	209,841
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,811,678
Real Estate and Accumulated Depreciation, Carrying Amount of Land	364,514
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,657,005
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,021,519
Real Estate and Accumulated Depreciation, Accumulated Depreciation	744,344
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,021,519
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	744,344
Operating Properties [Member] | 9002-9036 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	492,320
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,511,381
Real Estate and Accumulated Depreciation, Carrying Amount of Land	899,284
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,104,417
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,003,701
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,109,566
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,003,701
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,109,566
Operating Properties [Member] | 901-933 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	500,391
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,254,173
Real Estate and Accumulated Depreciation, Carrying Amount of Land	840,314
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,914,250
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,754,564
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,671,876
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,754,564
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,671,876
Operating Properties [Member] | 9020 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,718,496
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,697,381
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	872,478
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,718,496
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,569,859
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,288,355
Real Estate and Accumulated Depreciation, Accumulated Depreciation	669,758
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	14,288,355
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	669,758
Operating Properties [Member] | 910-926 Chad Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	201,771
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,616,963
Real Estate and Accumulated Depreciation, Carrying Amount of Land	628,237
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,190,497
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,818,734
Real Estate and Accumulated Depreciation, Accumulated Depreciation	412,480
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,818,734
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	412,480
Operating Properties [Member] | 9110 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,203,200
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,979,540
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	221,983
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,203,200
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,201,523
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,404,723
Real Estate and Accumulated Depreciation, Accumulated Depreciation	492,958
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,404,723
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	492,958
Operating Properties [Member] | 9203 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	754,832
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,966,864
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	92,249
Real Estate and Accumulated Depreciation, Carrying Amount of Land	754,832
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,059,113
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,813,945
Real Estate and Accumulated Depreciation, Accumulated Depreciation	405,712
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,813,945
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	405,712
Operating Properties [Member] | 9306-24 East Broadway Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	450,440
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,303,369
Real Estate and Accumulated Depreciation, Carrying Amount of Land	486,004
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,267,805
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,753,809
Real Estate and Accumulated Depreciation, Accumulated Depreciation	565,618
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,753,809
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	565,618
Operating Properties [Member] | 9319 Peach Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	612,536
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,168,473
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,700
Real Estate and Accumulated Depreciation, Carrying Amount of Land	612,536
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,178,173
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,790,709
Real Estate and Accumulated Depreciation, Accumulated Depreciation	224,848
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,790,709
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	224,848
Operating Properties [Member] | 9704 Solar Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	374,548
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,354,800
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	128,373
Real Estate and Accumulated Depreciation, Carrying Amount of Land	374,548
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,483,173
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,857,721
Real Estate and Accumulated Depreciation, Accumulated Depreciation	79,076
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,857,721
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	79,076
Operating Properties [Member] | 9945 Currie Davis Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,134,286
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,241,807
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	380,833
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,134,286
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,622,639
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,756,925
Real Estate and Accumulated Depreciation, Accumulated Depreciation	404,236
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,756,925
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	404,236
Operating Properties [Member] | 1858 E Encanto Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	877,611
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,485,427
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	190,934
Real Estate and Accumulated Depreciation, Carrying Amount of Land	877,611
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,676,361
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,553,972
Real Estate and Accumulated Depreciation, Accumulated Depreciation	215,576
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,553,972
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	215,576
Operating Properties [Member] | 475 W Vaughn St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,112,245
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,260,348
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	134,556
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,112,245
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,394,904
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,507,149
Real Estate and Accumulated Depreciation, Accumulated Depreciation	124,956
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,507,149
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	124,956
Operating Properties [Member] | 921 South Park Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,192,820
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,580,155
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	477,881
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,192,820
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,058,037
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,250,857
Real Estate and Accumulated Depreciation, Accumulated Depreciation	215,318
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,250,857
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	215,318
Operating Properties [Member] | 8313 West Pierce Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tolleson, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,295,090
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,079,811
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,224,097
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,295,090
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,303,908
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,598,998
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,172,179
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	14,598,998
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,172,179
Operating Properties [Member] | 8591 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tolleson, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,574,912
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,308,021
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	274,301
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,574,912
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,582,322
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,157,234
Real Estate and Accumulated Depreciation, Accumulated Depreciation	557,915
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,157,234
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	557,915
Operating Properties [Member] | 8601 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tolleson, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,524,603
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,352,070
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	926,360
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,524,603
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,278,430
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,803,033
Real Estate and Accumulated Depreciation, Accumulated Depreciation	596,068
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,803,033
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	596,068
Operating Properties [Member] | 5111 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tucker, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	435,776
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,875,685
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	375,872
Real Estate and Accumulated Depreciation, Carrying Amount of Land	435,776
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,251,558
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,687,334
Real Estate and Accumulated Depreciation, Accumulated Depreciation	126,111
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,687,334
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	126,111
Operating Properties [Member] | 5151 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tucker, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	345,061
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,428,840
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	203,538
Real Estate and Accumulated Depreciation, Carrying Amount of Land	345,061
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,632,378
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,977,439
Real Estate and Accumulated Depreciation, Accumulated Depreciation	105,687
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,977,439
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	105,687
Operating Properties [Member] | 1457 Miller Store Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Virginia Beach, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	473,689
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,663,045
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	376,763
Real Estate and Accumulated Depreciation, Carrying Amount of Land	474,746
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,038,751
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,513,497
Real Estate and Accumulated Depreciation, Accumulated Depreciation	953,946
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,513,497
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	953,946
Operating Properties [Member] | 200 Golden Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Virginia Beach, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,116,693
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,770,480
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,239,720
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,116,693
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,010,200
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,126,893
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,839,287
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,126,893
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,839,287
Operating Properties [Member] | 208 Golden Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Virginia Beach, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	965,177
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,728,717
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,174,995
Real Estate and Accumulated Depreciation, Carrying Amount of Land	965,177
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,903,712
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,868,889
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,840,691
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,868,889
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,840,691
Operating Properties [Member] | 2809 South Lynnhaven Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Virginia Beach, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	953,590
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,142,742
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,944,512
Real Estate and Accumulated Depreciation, Carrying Amount of Land	953,590
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,087,254
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,040,844
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,219,121
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,040,844
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,219,121
Operating Properties [Member] | 484 Viking Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Virginia Beach, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	891,753
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,607,890
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	614,231
Real Estate and Accumulated Depreciation, Carrying Amount of Land	891,753
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,222,120
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,113,873
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,756,749
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,113,873
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,756,749
Operating Properties [Member] | 629 Phoenix Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Virginia Beach, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	371,694
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,108,097
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	224,602
Real Estate and Accumulated Depreciation, Carrying Amount of Land	371,694
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,332,699
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,704,393
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,022,536
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,704,393
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,022,536
Operating Properties [Member] | 1100 17th Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Washington, DC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	16,558,660
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	32,223,978
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,393,698
Real Estate and Accumulated Depreciation, Carrying Amount of Land	16,558,660
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	33,617,676
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	50,176,336
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,209,304
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	50,176,336
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,209,304
Operating Properties [Member] | 2100 M Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Washington, DC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	70,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	55,123,783
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	187,024
Real Estate and Accumulated Depreciation, Carrying Amount of Land	70,000,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	55,310,807
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	125,310,807
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,154,200
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	125,310,807
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,154,200
Operating Properties [Member] | 1200 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Wayne, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	6,215,667
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,363,338
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,223,660
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,355,345
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	15,579,005
Real Estate and Accumulated Depreciation, Accumulated Depreciation	4,284,684
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	15,579,005
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	4,284,684
Operating Properties [Member] | 1500 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Wayne, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	8,287,555
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	32,195,630
Real Estate and Accumulated Depreciation, Carrying Amount of Land	11,636,499
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	28,846,687
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	40,483,186
Real Estate and Accumulated Depreciation, Accumulated Depreciation	9,511,047
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	40,483,186
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	9,511,047
Operating Properties [Member] | 825 Duportail Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Wayne, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,536,619
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,179,213
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,024,029
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,539,281
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	21,200,581
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	26,739,862
Real Estate and Accumulated Depreciation, Accumulated Depreciation	8,512,691
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1979
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	26,739,862
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	8,512,691
Operating Properties [Member] | 400-500 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	West Chester, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	845,846
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,809,025
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	656,822
Real Estate and Accumulated Depreciation, Carrying Amount of Land	845,846
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,465,848
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,311,694
Real Estate and Accumulated Depreciation, Accumulated Depreciation	3,244,935
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,311,694
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	3,244,935
Operating Properties [Member] | 600 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	West Chester, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	664,899
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,352,410
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	889,805
Real Estate and Accumulated Depreciation, Carrying Amount of Land	664,899
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,242,216
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,907,115
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,747,719
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,907,115
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,747,719
Operating Properties [Member] | 1400 Powis Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	West Chicago, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	578,314
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,448,562
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	72,418
Real Estate and Accumulated Depreciation, Carrying Amount of Land	578,314
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,520,981
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,099,295
Real Estate and Accumulated Depreciation, Accumulated Depreciation	98,567
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,099,295
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	98,567
Operating Properties [Member] | 1 Kings Hill Aveune [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	West Malling, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,288,389
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,705,320
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,898,275
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,095,435
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,993,710
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,233,844
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	13,993,710
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,233,844
Operating Properties [Member] | 42 Kings Hill Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	West Malling, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,397,739
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	12,477,732
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,232,077
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	13,643,395
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	17,875,472
Real Estate and Accumulated Depreciation, Accumulated Depreciation	2,587,023
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	17,875,472
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	2,587,023
Operating Properties [Member] | Liberty Square Retail Blocks [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	West Malling, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	559,590
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,113,902
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,397,215
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,121,039
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,949,669
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,070,708
Real Estate and Accumulated Depreciation, Accumulated Depreciation	1,871,518
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,070,708
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,871,518
Operating Properties [Member] | 1400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	West Palm Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,454,972
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,312,829
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	276,501
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,454,972
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,589,331
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,044,303
Real Estate and Accumulated Depreciation, Accumulated Depreciation	293,340
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,044,303
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	293,340
Operating Properties [Member] | 300 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	West Palm Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,177,064
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,102,451
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	125,705
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,177,064
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,228,157
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,405,221
Real Estate and Accumulated Depreciation, Accumulated Depreciation	111,003
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,405,221
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	111,003
Operating Properties [Member] | 400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	West Palm Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,029,595
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,728,187
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	123,734
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,029,595
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,851,922
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,881,517
Real Estate and Accumulated Depreciation, Accumulated Depreciation	84,638
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,881,517
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	84,638
Operating Properties [Member] | 2935 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Weston, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,682,521
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,905,125
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	558,332
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,682,521
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	26,463,458
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	31,145,979
Real Estate and Accumulated Depreciation, Accumulated Depreciation	959,558
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	31,145,979
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	959,558
Operating Properties [Member] | 2945 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Weston, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,345,242
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,973,765
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	273,455
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,345,242
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	14,247,221
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	16,592,463
Real Estate and Accumulated Depreciation, Accumulated Depreciation	510,298
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	16,592,463
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	510,298
Operating Properties [Member] | 43-47 Hintz Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Wheeling, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0	[1]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,051,093
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,283,479
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	536,842
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,051,093
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	18,820,323
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	20,871,416
Real Estate and Accumulated Depreciation, Accumulated Depreciation	719,097
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	20,871,416
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	719,097
Operating Properties [Member] | 10 Cornell Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Wilmington, MA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	598,120
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,142,735
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	232,897
Real Estate and Accumulated Depreciation, Carrying Amount of Land	598,120
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,375,632
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,973,752
Real Estate and Accumulated Depreciation, Accumulated Depreciation	127,256
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,973,752
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	127,256
Operating Properties [Member] | 265 Ballardvale Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Wilmington, MA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	868,433
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,358,997
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	345,915
Real Estate and Accumulated Depreciation, Carrying Amount of Land	868,433
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,704,913
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,573,346
Real Estate and Accumulated Depreciation, Accumulated Depreciation	352,364
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,573,346
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	352,364
Operating Properties [Member] | 4000 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	51,784
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,097,969
Real Estate and Accumulated Depreciation, Carrying Amount of Land	616,467
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,533,286
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,149,753
Real Estate and Accumulated Depreciation, Accumulated Depreciation	430,422
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,149,753
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	430,422
Operating Properties [Member] | Maximum [Member] | 1467 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1501 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 869 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 901 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 200 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 250 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 400 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 650 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 651 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 700 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 705 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7165 Ambassador Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7248 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7339 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7437 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8014 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8150 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8250 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8400 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6330 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6350 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6370 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6390 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6520 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6540 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6560 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6580 Snowdrift Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7620 Cetronia Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3095 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3097 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7030 Buford Highway NE [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | Barton 150 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1055-1071 Kingsland Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4606 Richlynn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 11800 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 11850 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 11900 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12104 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12140 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12200 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12240 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1071 Thorndale Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1260-1274 Ellis Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 371-377 Meyer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 850-880 Devon Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10 Emery Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2785 Commerce Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 74 West Broad Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10801 Nesbitt Avenue South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5705 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5715 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5735 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5775 West Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6161 Green Valley Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6601-6625 W. 78th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 750 Park of Commerce Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 777 Yamato Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 951 Broken Sound Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1455 Remington Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 150 E Crossroads Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 553 S Joliet Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 400 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8201 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8500 Industrial Bouldvard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 860 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1485 W Commerce Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 40 Logistics Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 135-195 East Elk Trail [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 515 Kehoe Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1413 Bradley Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3200 Belmeade Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1475 Nitterhouse Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 95 Kriner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9000 109th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 11701 Goodrich Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12810 Virkler Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2700 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2701 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2730 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2801 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3000 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3005 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4045 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4047 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4525 Statesville Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4835 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4925 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5033 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5039 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8910 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8916 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1301 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1305 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1309 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1313 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2601 Indian River Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 500 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 501 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 505 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 510 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 676 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 700 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1540 S 54th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4650 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4750 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9645 Gerwig Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2550 John Glenn Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3800 Twin Creeks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 455 Airline Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2130 Baldwin Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 329-333 Herrod Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1250 Hall Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 301-321 S Goolsby Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1680 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1700 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2670 Breckinridge Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 170 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 190 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 265 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 285 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1000 Parliament Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4226 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4227 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4234 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4300 Emperor Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3169 Dodd Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3255 Neil Armstrong Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3711 Kennebec Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 917 Lone Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10301-10305 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10321 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10333 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10349-10357 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10365-10375 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10393-10394 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10400 Viking Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7075 Flying Cloud Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7078 Shady Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7615 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7625 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7695-7699 Anagram Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7777 Golden Triangle Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7800 Equitable Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7905 Fuller Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8855 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8911 Columbine Road (B2) [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8937 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8967 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8995 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9023 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2250 Arthur Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6600 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6675 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7351 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 21705-21707 Mississippi Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 27143 S Baseline Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1800 Donaldson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 180 Sheree Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6880 Fairfield Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7000-7018 Fairfield Business [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2000 Southpointe Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1400 NW 65th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6500 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6501 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6600 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5400 Alliance Gateway Freeway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 101 Constitution Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 20 Liberty Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9601 Cosner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 200 W Cypress Creek Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5410 - 5430 Northwest 33rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12601 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12641 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12681-12691 Pala Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 850 S Jupiter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2510 W Main Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4251 North Highway 121 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 116 Pleasant Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 25 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 45 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2011 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2121 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 800 Commerce Parkway West Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 100 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1487 South Highway 101 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2727 London Grove Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 11841 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1 Enterprise Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1317 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 21 Enterprise Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 22 Enterprise Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5 Manhattan Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 521 Butler Farm Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1560 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1575 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7361 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 500 McCarthy Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 600 Industrial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7195 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7253 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12537 Cerise Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1010 Petersburg Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 785 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 805 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 825 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 845 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1498 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4183 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4189 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4195 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4328, 4336 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4344 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4380 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4388 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4475 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4500 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4501 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4523 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4524 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | Unit 5 Logix Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1515 6th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1600 5th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 100 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 100 Witmer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 100-107 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 101 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 101-111 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 102 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 103-109 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 104 Witmer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 110 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 111-159 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 113-123 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 120 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 123-135 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 132 Welsh Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 161-175 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 181-187 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2 Walnut Grove Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 200 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 200-264 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 201 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 210-223 Witmer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 220 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 231-237 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 240 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 261-283 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 300 Welsh Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 300 Welsh Road - Building 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 300 Welsh Road - Building 4 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 300-309 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4 Walnut Grove [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 400-445 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 455 Business Center Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5 Walnut Grove Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 506 Prudential Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 507 Prudential Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2920 Northwest Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 555 Business Center Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5905 Trenton Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 680 Blair Mill Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6055 Nathan Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7 Walnut Grove Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1400 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 700 Dresher Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1405 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 747 Dresher Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1500 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 767 Electronic Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1501 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1000 South Loop West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1601 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10241 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1651 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10245 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2201-2215 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10301 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2250-2270 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10305 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2280-2300 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10607 Haddington Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2301-2329 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10735 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3000 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10739 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3001-3037 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 11201 Greens Crossing Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1283 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1287 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1291 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1416 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1420 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 14200 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1424 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1428 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 14300 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 14400 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 15102 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 15150 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 16330 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 16405 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 16420 West Hardy Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 16445 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1646 Rankin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1655 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 16580 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 16602 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 16605 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1665 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 16680 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 16685 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1755 Trans Central Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4301 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4401 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4501 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5200 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5250 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5500 N. Sam Houston Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8017 Pinemont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8272 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8282 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8301 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 850 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 860 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8801-19 & 8821-49 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8802-8824 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8825-8839 N Sam Houston Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8850-8872 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | Liberty 11 at Central Green [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | Cabot III UK1B01 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1011 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1035 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1549 W Glenlake Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 901 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 925 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8241 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8242 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8246 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1305 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1325 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3600 Cobb International Bld NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | Unit 1 Bear Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 151 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 170 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 180 South Warner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 190 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2100 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2201 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2300 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2301 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2500 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2520 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2560 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2700 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2900 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3000 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3100 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3200 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3400 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3500 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3600 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3602 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3604 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 440 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 460 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 650 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 680 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1700 Interstate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5801 Columbia Park Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 11425 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 11503 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 640 S State Road 39 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7528 Walker Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8301 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8500 Willard Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 875 Maxham Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7533 Industrial Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10, 20 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 100 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1001 Cedar Hollow Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 11 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 11,15 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12,14,16 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 14 Lee Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 155 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 18 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2 West Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 20 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 200 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 257-275 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 27-43 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 277-293 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 30 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 300 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 300-400 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 311 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 333 Phoenixville Pike [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 375 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 40 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 40 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 420 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 425 Old Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 425 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 45 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 45-67 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 50 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 50 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 500 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 508 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 510 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 55 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 60 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 600 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 65 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 700 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 75 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 77-123 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1169 Canton Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 65 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 75 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 126-132 Liberty Industrial Pkw [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 95-115 Liberty Industrial Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 11401 NW 134th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3824-3960 Crowfarn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12501 & 12701 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12800 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 12900 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5400-5500 Feltl Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6000 Clearwater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 456 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3100 SW 145th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3350 SW 148th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3400 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3450 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 21 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 22750 Cactus Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 323 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 324 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 619 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 627 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 701 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 220 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 222 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1879 Lamont Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 350 Winmeyer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4000 E Airport Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1000 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10003 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10511 & 10611 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10771 Palm Bay Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1090 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1400-1440 Central Florida Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1902 Cypress Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2000 Park Oaks Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2202 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2212 Taft Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2256 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2351 Investors Row [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2400 South Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2412 Sand Lake Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2416 Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6200 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6501 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6918 Presidents Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6923 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7022 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7100 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7101 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7315 Kingspointe Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8201 Chancellor Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 851 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 950 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9550 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9600 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9700 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 13 Centennial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 150 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4050 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4300 South 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4751 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4775 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8th & Walnut Streets [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2626 South 7th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4207 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4217 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4303 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4313 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4405 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4410 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4415 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4425 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4435 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4450 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4610 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4750 S. 44th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 563 South 63rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9801 South 51st Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | Cotton Center Building 18 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1000 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1901 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1909 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3605 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3701 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 800 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 900 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9801 80th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 14630-14650 28th Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3012-3050 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 595 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 601 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 605 SW 16th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1920 West Baseline Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 301 Hill Carter Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4101-4127 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4201-4261 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4263-4299 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4263F-N. Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4301-4335 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4337-4379 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4401-4445 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4447-4491 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4501-4549 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4551-4593 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4601-4643 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4645-4683 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4717-4729 Eubank Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 510 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 520 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 530 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 540 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5600-5626 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5601-5659 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5650-5674 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5700 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5701-5799 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5900 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6000 Eastport Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2020 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6530 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6532 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 13098 George Weber Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 13220 Wilfred Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 13225 Brockton Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1070 Windham Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1550 Central Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1135 Aviation Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8715 Bollman Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8501 East Raintree Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1150 Gateway Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5555 12th Avenue East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1210 Champion Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9300 Old Scotland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3990 Heritage Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3654-3668 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3701 Illinois Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3950-3980 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1501 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1527 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1551 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6900 Harbor View Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6920 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 6950 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1516 Fryar Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1301 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 13621 NW 12th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 13630 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 13650 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 111 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 131 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 150-182 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 200-34 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3102,3104,3110 Cherry Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3401-3409 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3502 Roga Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3505 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 3608 Queen Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4502 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4503 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4505 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4508 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4511 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4520 Seedling Circle [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4630 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4631 Woodland Corporate Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 501 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5250 Eagle Trail Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5501-5519 Pioneer Park Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5690-5694 Crenshaw Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 701-725 South US Hwy 301 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7621 Bald Cypress Place (Bldg N) [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7724 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7725 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7802-50 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7851-7861 Woodland Center Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7852-98 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7920 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 7930, 8010-20 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8001 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8110 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8112-42 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8130 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8154-8198 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8212 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8401-8408 Benjamin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8705 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8715 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8725 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8735 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8745 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8900-34 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8921 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9001-9015 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9002-9036 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 901-933 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9020 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 910-926 Chad Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9110 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9203 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9306-24 East Broadway Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9319 Peach Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9704 Solar Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 9945 Currie Davis Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1858 E Encanto Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 475 W Vaughn St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 921 South Park Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8313 West Pierce Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8591 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 8601 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5111 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 5151 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1457 Miller Store Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 200 Golden Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 208 Golden Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2809 South Lynnhaven Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 484 Viking Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 629 Phoenix Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1100 17th Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2100 M Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1200 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1500 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 825 Duportail Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 400-500 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 600 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1400 Powis Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1 Kings Hill Aveune [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 42 Kings Hill Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | Liberty Square Retail Blocks [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 1400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 300 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2935 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 2945 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 43-47 Hintz Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 10 Cornell Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 265 Ballardvale Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Maximum [Member] | 4000 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	40 years
Operating Properties [Member] | Minimum [Member] | 1467 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1501 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 869 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 901 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 200 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 250 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 400 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 650 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 651 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 700 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 705 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7165 Ambassador Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7248 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7339 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7437 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8014 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8150 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8250 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8400 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6330 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6350 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6370 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6390 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6520 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6540 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6560 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6580 Snowdrift Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7620 Cetronia Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3095 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3097 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7030 Buford Highway NE [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | Barton 150 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1055-1071 Kingsland Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4606 Richlynn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 11800 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 11850 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 11900 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12104 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12140 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12200 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12240 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1071 Thorndale Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1260-1274 Ellis Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 371-377 Meyer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 850-880 Devon Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10 Emery Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2785 Commerce Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 74 West Broad Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10801 Nesbitt Avenue South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5705 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5715 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5735 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5775 West Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6161 Green Valley Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6601-6625 W. 78th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 750 Park of Commerce Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 777 Yamato Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 951 Broken Sound Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1455 Remington Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 150 E Crossroads Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 553 S Joliet Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 400 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8201 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8500 Industrial Bouldvard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 860 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1485 W Commerce Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 40 Logistics Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 135-195 East Elk Trail [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 515 Kehoe Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1413 Bradley Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3200 Belmeade Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1475 Nitterhouse Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 95 Kriner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9000 109th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 11701 Goodrich Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12810 Virkler Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2700 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2701 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2730 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2801 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3000 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3005 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4045 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4047 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4525 Statesville Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4835 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4925 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5033 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5039 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8910 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8916 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1301 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1305 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1309 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1313 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2601 Indian River Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 500 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 501 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 505 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 510 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 676 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 700 Independence Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1540 S 54th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4650 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4750 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9645 Gerwig Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2550 John Glenn Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3800 Twin Creeks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 455 Airline Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2130 Baldwin Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 329-333 Herrod Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1250 Hall Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 301-321 S Goolsby Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1680 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1700 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2670 Breckinridge Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 170 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 190 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 265 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 285 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1000 Parliament Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4226 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4227 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4234 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4300 Emperor Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3169 Dodd Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3255 Neil Armstrong Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3711 Kennebec Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 917 Lone Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10301-10305 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10321 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10333 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10349-10357 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10365-10375 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10393-10394 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10400 Viking Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7075 Flying Cloud Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7078 Shady Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7615 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7625 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7695-7699 Anagram Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7777 Golden Triangle Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7800 Equitable Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7905 Fuller Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8855 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8911 Columbine Road (B2) [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8937 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8967 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8995 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9023 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2250 Arthur Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6600 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6675 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7351 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 21705-21707 Mississippi Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 27143 S Baseline Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1800 Donaldson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 180 Sheree Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6880 Fairfield Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7000-7018 Fairfield Business [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2000 Southpointe Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1400 NW 65th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6500 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6501 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6600 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5400 Alliance Gateway Freeway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 101 Constitution Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 20 Liberty Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9601 Cosner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 200 W Cypress Creek Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5410 - 5430 Northwest 33rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12601 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12641 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12681-12691 Pala Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 850 S Jupiter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2510 W Main Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4251 North Highway 121 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 116 Pleasant Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 25 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 45 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2011 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2121 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 800 Commerce Parkway West Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 100 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1487 South Highway 101 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2727 London Grove Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 11841 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1 Enterprise Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1317 Executive Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 21 Enterprise Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 22 Enterprise Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5 Manhattan Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 521 Butler Farm Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1560 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1575 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7361 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 500 McCarthy Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 600 Industrial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7195 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7253 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12537 Cerise Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1010 Petersburg Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 785 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 805 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 825 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 845 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1498 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4183 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4189 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4195 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4328, 4336 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4344 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4380 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4388 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4475 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4500 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4501 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4523 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4524 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | Unit 5 Logix Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1515 6th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1600 5th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 100 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 100 Witmer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 100-107 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 101 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 101-111 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 102 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 103-109 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 104 Witmer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 110 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 111-159 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 113-123 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 120 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 123-135 Rock Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 132 Welsh Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 161-175 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 181-187 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2 Walnut Grove Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 200 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 200-264 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 201 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 210-223 Witmer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 220 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 231-237 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 240 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 261-283 Gibraltar Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 300 Welsh Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 300 Welsh Road - Building 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 300 Welsh Road - Building 4 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 300-309 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4 Walnut Grove [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 400-445 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 455 Business Center Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5 Walnut Grove Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 506 Prudential Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 507 Prudential Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2920 Northwest Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 555 Business Center Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5905 Trenton Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 680 Blair Mill Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6055 Nathan Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7 Walnut Grove Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1400 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 700 Dresher Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1405 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 747 Dresher Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1500 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 767 Electronic Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1501 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1000 South Loop West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1601 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10241 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1651 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10245 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2201-2215 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10301 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2250-2270 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10305 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2280-2300 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10607 Haddington Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2301-2329 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10735 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3000 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10739 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3001-3037 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 11201 Greens Crossing Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1283 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1287 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1291 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1416 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1420 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 14200 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1424 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1428 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 14300 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 14400 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 15102 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 15150 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 16330 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 16405 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 16420 West Hardy Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 16445 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1646 Rankin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1655 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 16580 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 16602 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 16605 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1665 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 16680 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 16685 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1755 Trans Central Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4301 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4401 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4501 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5200 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5250 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5500 N. Sam Houston Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8017 Pinemont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8272 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8282 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8301 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 850 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 860 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8801-19 & 8821-49 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8802-8824 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8825-8839 N Sam Houston Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8850-8872 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | Liberty 11 at Central Green [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | Cabot III UK1B01 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1011 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1035 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1549 W Glenlake Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 901 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 925 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8241 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8242 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8246 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1305 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1325 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3600 Cobb International Bld NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | Unit 1 Bear Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 151 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 170 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 180 South Warner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 190 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2100 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2201 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2300 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2301 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2500 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2520 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2560 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2700 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2900 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3000 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3100 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3200 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3400 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3500 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3600 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3602 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3604 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 440 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 460 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 650 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 680 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1700 Interstate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5801 Columbia Park Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 11425 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 11503 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 640 S State Road 39 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7528 Walker Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8301 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8500 Willard Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 875 Maxham Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7533 Industrial Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10, 20 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 100 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1001 Cedar Hollow Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 11 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 11,15 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12,14,16 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 14 Lee Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 155 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 18 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2 West Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 20 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 200 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 257-275 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 27-43 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 277-293 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 30 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 300 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 300-400 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 311 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 333 Phoenixville Pike [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 375 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 40 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 40 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 420 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 425 Old Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 425 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 45 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 45-67 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 50 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 50 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 500 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 508 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 510 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 55 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 60 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 600 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 65 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 700 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 75 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 77-123 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1169 Canton Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 65 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 75 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 126-132 Liberty Industrial Pkw [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 95-115 Liberty Industrial Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 11401 NW 134th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3824-3960 Crowfarn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12501 & 12701 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12800 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 12900 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5400-5500 Feltl Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6000 Clearwater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 456 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3100 SW 145th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3350 SW 148th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3400 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3450 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 21 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 22750 Cactus Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 323 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 324 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 619 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 627 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 701 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 220 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 222 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1879 Lamont Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 350 Winmeyer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4000 E Airport Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1000 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10003 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10511 & 10611 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10771 Palm Bay Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1090 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1400-1440 Central Florida Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1902 Cypress Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2000 Park Oaks Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2202 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2212 Taft Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2256 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2351 Investors Row [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2400 South Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2412 Sand Lake Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2416 Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6200 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6501 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6918 Presidents Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6923 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7022 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7100 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7101 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7315 Kingspointe Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8201 Chancellor Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 851 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 950 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9550 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9600 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9700 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 13 Centennial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 150 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4050 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4300 South 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4751 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4775 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8th & Walnut Streets [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2626 South 7th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4207 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4217 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4303 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4313 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4405 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4410 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4415 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4425 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4435 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4450 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4610 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4750 S. 44th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 563 South 63rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9801 South 51st Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | Cotton Center Building 18 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1000 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1901 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1909 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3605 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3701 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 800 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 900 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9801 80th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 14630-14650 28th Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3012-3050 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 595 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 601 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 605 SW 16th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1920 West Baseline Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 301 Hill Carter Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4101-4127 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4201-4261 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4263-4299 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4263F-N. Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4301-4335 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4337-4379 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4401-4445 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4447-4491 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4501-4549 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4551-4593 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4601-4643 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4645-4683 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4717-4729 Eubank Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 510 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 520 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 530 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 540 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5600-5626 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5601-5659 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5650-5674 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5700 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5701-5799 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5900 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6000 Eastport Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2020 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6530 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6532 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 13098 George Weber Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 13220 Wilfred Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 13225 Brockton Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1070 Windham Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1550 Central Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1135 Aviation Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8715 Bollman Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8501 East Raintree Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1150 Gateway Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5555 12th Avenue East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1210 Champion Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9300 Old Scotland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3990 Heritage Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3654-3668 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3701 Illinois Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3950-3980 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1501 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1527 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1551 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6900 Harbor View Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6920 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 6950 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1516 Fryar Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1301 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 13621 NW 12th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 13630 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 13650 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 111 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 131 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 150-182 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 200-34 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3102,3104,3110 Cherry Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3401-3409 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3502 Roga Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3505 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 3608 Queen Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4502 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4503 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4505 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4508 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4511 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4520 Seedling Circle [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4630 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4631 Woodland Corporate Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 501 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5250 Eagle Trail Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5501-5519 Pioneer Park Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5690-5694 Crenshaw Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 701-725 South US Hwy 301 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7621 Bald Cypress Place (Bldg N) [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7724 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7725 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7802-50 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7851-7861 Woodland Center Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7852-98 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7920 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 7930, 8010-20 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8001 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8110 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8112-42 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8130 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8154-8198 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8212 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8401-8408 Benjamin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8705 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8715 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8725 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8735 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8745 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8900-34 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8921 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9001-9015 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9002-9036 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 901-933 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9020 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 910-926 Chad Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9110 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9203 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9306-24 East Broadway Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9319 Peach Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9704 Solar Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 9945 Currie Davis Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1858 E Encanto Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 475 W Vaughn St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 921 South Park Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8313 West Pierce Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8591 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 8601 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5111 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 5151 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1457 Miller Store Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 200 Golden Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 208 Golden Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2809 South Lynnhaven Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 484 Viking Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 629 Phoenix Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1100 17th Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2100 M Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1200 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1500 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 825 Duportail Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 400-500 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 600 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1400 Powis Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1 Kings Hill Aveune [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 42 Kings Hill Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | Liberty Square Retail Blocks [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 1400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 300 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2935 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 2945 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 43-47 Hintz Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 10 Cornell Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 265 Ballardvale Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Operating Properties [Member] | Minimum [Member] | 4000 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation	5 years
Development in Progress [Member] | 330 South Royal Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Coppell, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,091,426
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,958,079
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,049,505
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,049,505
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,049,505
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 11020 Holly Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Dayton, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,536,731
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,271,776
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,808,507
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,808,507
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,808,507
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 333 Howard Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Des Plaines, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	7,928,724
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,619,989
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,548,713
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,548,713
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,548,713
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 120 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,243,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,263,759
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,506,859
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,506,859
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,506,859
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 130 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,171,160
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	628,480
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,799,640
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,799,640
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,799,640
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 140 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,243,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,249,949
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,493,049
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,493,049
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,493,049
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 11835 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hagerstown, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	14,121,622
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	14,631,418
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	28,753,040
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	28,753,040
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	28,753,040
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 7460 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hanover, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,785,446
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,118,710
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,904,156
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,904,156
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,904,156
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 7462 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hanover, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,059,337
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,115,061
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,174,398
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,174,398
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,174,398
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 1050 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	973,482
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,588,294
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,561,776
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,561,776
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,561,776
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 10720 West Sam Houston Parkway North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,871,875
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	21,894,894
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	25,766,769
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	25,766,769
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	25,766,769
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 11220 Ella Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,505,855
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	7,268,433
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,774,288
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,774,288
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,774,288
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 8303 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,613,370
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	13,220,947
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	17,834,317
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	17,834,317
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	17,834,317
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 11150 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Medley, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	6,627,899
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	412,601
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,040,500
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,040,500
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,040,500
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 11250 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Medley, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,798,886
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,641,003
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	10,439,889
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	10,439,889
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	10,439,889
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 11500 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Miami, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,623,293
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	10,917,535
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	12,540,828
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,540,828
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,540,828
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 10020 South Reinhart Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Oak Creek, WI
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,516,764
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,341,820
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,858,584
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,858,584
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,858,584
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 1200 Intrepid Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	16,169
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,752,441
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,768,610
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,768,610
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,768,610
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 201 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	243,905
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	22,485,941
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	22,729,846
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	22,729,846
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	22,729,846
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 4000 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,255,507
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,402,214
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	9,657,721
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	9,657,721
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	9,657,721
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 4701 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	419,107
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,143,242
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	1,562,349
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,562,349
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,562,349
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 5800 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	604,146
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,974,279
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,578,425
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,578,425
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,578,425
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 1720 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,629,020
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	577,191
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,206,211
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,206,211
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,206,211
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 1850 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,975,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	19,642,158
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	23,617,758
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	23,617,758
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	23,617,758
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | 1910 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,693,504
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	12,742,133
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	17,435,637
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	17,435,637
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	17,435,637
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Development in Progress [Member] | Total Development in Progress [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	77,549,028
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	199,862,347
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	277,411,375
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	277,411,375
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	277,411,375
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | 4551 New York Avenue Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Arlington, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,754,659
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	24,126
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,778,784
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,778,784
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,778,784
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Mill Creek Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Bethlehem, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	18,548,585
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,815,956
Real Estate and Accumulated Depreciation, Carrying Amount of Land	20,364,541
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	20,364,541
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	20,364,541
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Boca Colannade Yamato Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Boca Raton, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,039,735
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	554,823
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,594,558
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,594,558
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,594,558
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | 12912 Virkler Drive Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	208,646
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	10,086
Real Estate and Accumulated Depreciation, Carrying Amount of Land	218,732
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	218,732
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	218,732
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Charlotte Distribution Center Land-Lot 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	654,713
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land	654,713
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	654,713
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	654,713
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Shopton Ridge Business Park Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,058,588
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,058,588
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,058,588
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,058,588
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Holly Lane North Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Dayton, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	889,205
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land	889,205
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	889,205
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	889,205
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | 1951 TW Alexander Drive Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,027,176
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	142,782
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,169,958
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,169,958
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,169,958
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Flying Cloud Drive Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Eden Pairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,051,631
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	26,366
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,077,997
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,077,997
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,077,997
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Camelback 303 Business Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Goodyear, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	16,857,556
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,219,563
Real Estate and Accumulated Depreciation, Carrying Amount of Land	20,077,119
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	20,077,119
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	20,077,119
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Pleasant Ridge Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greensboro, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	564,535
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,841,863
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,406,398
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,406,398
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,406,398
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Caliber Ridge Ind. Park Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	16,338
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	43,596
Real Estate and Accumulated Depreciation, Carrying Amount of Land	59,934
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	59,934
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	59,934
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Lakefront Plaza II Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hampton, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	138,101
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	102,764
Real Estate and Accumulated Depreciation, Carrying Amount of Land	240,865
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	240,865
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	240,865
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Ridge Road & Hanover Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hanover, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,875,203
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	211,720
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,086,923
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,086,923
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	4,086,923
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Ridge Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Hanover, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,371,183
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	443,379
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,814,562
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,814,562
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,814,562
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Piedmond Centre Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	913,276
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	896,066
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,809,342
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,809,342
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,809,342
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Commonwealth Corporate Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Horsham, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,043,938
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	24,659
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,068,597
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,068,597
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,068,597
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Interwood Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,160,668
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	14,362
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,175,030
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,175,030
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,175,030
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Rankin Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,756,865
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,417,911
Real Estate and Accumulated Depreciation, Carrying Amount of Land	7,174,776
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,174,776
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	7,174,776
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Richey Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	26,135,466
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	707,105
Real Estate and Accumulated Depreciation, Carrying Amount of Land	26,842,571
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	26,842,571
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	26,842,571
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Taub Beltway 8 Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,611,474
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	628,497
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,239,971
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,239,971
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,239,971
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Frye Road and Valley View Lane Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Irving, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,901,634
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	24,398
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,926,032
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,926,032
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,926,032
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Kent County, UK [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Kent, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land	11,079,465
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,079,465
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,079,465
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Commodore Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Logan, NJ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	792,118
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,126,107
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,918,225
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,918,225
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,918,225
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Spring Creek Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Lower Macungie Twp, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	25,615,668
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	17,189,074
Real Estate and Accumulated Depreciation, Carrying Amount of Land	42,804,742
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	42,804,742
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	42,804,742
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | 380 Old Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,344,809
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,344,809
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	1,344,809
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	1,344,809
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Quarry Ridge Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	675,499
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	141,517
Real Estate and Accumulated Depreciation, Carrying Amount of Land	817,016
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	817,016
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	817,016
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Miami International Tradeport Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Medley, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	16,739,632
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,947,142
Real Estate and Accumulated Depreciation, Carrying Amount of Land	19,686,774
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	19,686,774
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	19,686,774
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Monarch Towne Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Mirarar, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	6,085,337
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	405,663
Real Estate and Accumulated Depreciation, Carrying Amount of Land	6,491,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,491,000
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,491,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | 557 Nazareth Pike Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Nazareth, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,667,646
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	343,645
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,011,291
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,011,291
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,011,291
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | South 27th Street Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Oak Creek, WI
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	427,838
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land	427,838
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	427,838
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	427,838
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Beachline Industrial Park Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	267,468
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	95,810
Real Estate and Accumulated Depreciation, Carrying Amount of Land	363,278
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	363,278
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	363,278
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Southern Boulevard Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Palm Beach County, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	12,042,368
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	200,186
Real Estate and Accumulated Depreciation, Carrying Amount of Land	12,242,554
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	12,242,554
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	12,242,554
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Buckeye Logistics Center West Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	11,203,594
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	65,658
Real Estate and Accumulated Depreciation, Carrying Amount of Land	11,269,252
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,269,252
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	11,269,252
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Cotton Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	8,237,744
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	702
Real Estate and Accumulated Depreciation, Carrying Amount of Land	8,238,446
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,238,446
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,238,446
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Woodlands Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Sandston, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	148,314
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	21,283
Real Estate and Accumulated Depreciation, Carrying Amount of Land	169,597
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	169,597
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	169,597
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Northsight Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Scottsdale, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	6,176,464
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,160,589
Real Estate and Accumulated Depreciation, Carrying Amount of Land	8,337,053
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,337,053
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,337,053
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Suffolk Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Suffolk, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,715,714
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	793,572
Real Estate and Accumulated Depreciation, Carrying Amount of Land	3,509,286
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,509,286
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	3,509,286
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | 6119 W. Linebaugh Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	180,136
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	29,890
Real Estate and Accumulated Depreciation, Carrying Amount of Land	210,026
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	210,026
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	210,026
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Legacy Park Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	3,289,423
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	4,908,708
Real Estate and Accumulated Depreciation, Carrying Amount of Land	8,198,131
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,198,131
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	8,198,131
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Renaissance Park Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property	Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,995,375
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	214,724
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,210,099
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,210,099
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Real Estate and Accumulated Depreciation, Date Acquired or Developed	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	2,210,099
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	0
Land Held for Development [Member] | Total Land Held for Development [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost of Land	214,184,322
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	43,794,292
Real Estate and Accumulated Depreciation, Carrying Amount of Land	269,058,078
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	269,058,078
Real Estate and Accumulated Depreciation, Accumulated Depreciation	0
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	269,058,078
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0

[1] Denotes property is collateralized under mortgages with Allianz, John Hancock, LaSalle Bank, Athene, New York Life and Wells Fargo totaling $424.2 million.