Schedule III (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Gross Amount Carried at End of Period	$ 7,014,490,000	$ 7,074,558,000	$ 6,704,262,000	$ 6,200,410,000
Accumulated Depreciation	$ 1,148,928,000	1,182,129,000	1,051,340,000	940,115,000
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,014,490,000	7,074,558,000	6,704,262,000
Real Estate Additions	472,282,000	562,299,000	602,585,000
Real Estate, Cost of Real Estate Sold	(1,286,362,000)	(622,367,000)	(232,289,000)
Real Estate, Gross	6,200,410,000	7,014,490,000	7,074,558,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,148,928,000	1,182,129,000	1,051,340,000
Real Estate Accumulated Depreciation, Depreciation Expense	168,077,000	182,011,000	179,143,000
Real Estate Accumulated Depreciation, Real Estate Sold	(376,890,000)	(215,212,000)	(48,354,000)
Real Estate Accumulated Depreciation	940,115,000	$ 1,148,928,000	$ 1,182,129,000
Allianz, John Hancock, LaSalle Bank, Athene, New York Life and Wells Fargo [Member] [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances				218,800,000
Total Real Estate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances				51,071,036
Initial Cost of Land				1,353,356,385
Initial Cost of Buildings				2,250,324,535
Costs Capitalized Subsequent to Acquisition				2,596,728,236
Land and Improvements				1,431,038,704
Building and Improvements				4,769,370,452
Gross Amount Carried at End of Period	6,200,409,156			6,200,409,156
Accumulated Depreciation	940,114,836			940,114,836
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	6,200,409,156
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 940,114,836
Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | 627 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Morrisville, NC
Encumbrances				0
Initial Cost of Land				1,061,370
Initial Cost of Buildings				5,152,110
Costs Capitalized Subsequent to Acquisition				526,179
Land and Improvements				1,061,632
Building and Improvements				5,678,027
Gross Amount Carried at End of Period	$ 6,739,659			6,739,659
Accumulated Depreciation	$ 1,586,152			1,586,152
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,739,659
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,586,152
Operating Properties [Member] | 1467 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Aberdeen, MD
Encumbrances				0
Initial Cost of Land				12,052,635
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				35,350,875
Land and Improvements				12,334,030
Building and Improvements				35,069,480
Gross Amount Carried at End of Period	$ 47,403,510			47,403,510
Accumulated Depreciation	$ 2,319,303			2,319,303
Date of Construction or Acquisition	1984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 47,403,510
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,319,303
Operating Properties [Member] | 1501 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Aberdeen, MD
Encumbrances				0
Initial Cost of Land				5,813,324
Initial Cost of Buildings				18,874,059
Costs Capitalized Subsequent to Acquisition				6,232,539
Land and Improvements				5,816,839
Building and Improvements				25,103,083
Gross Amount Carried at End of Period	$ 30,919,922			30,919,922
Accumulated Depreciation	$ 6,723,493			6,723,493
Date of Construction or Acquisition	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 30,919,922
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 6,723,493
Operating Properties [Member] | 869 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Addison, IL
Encumbrances				0
Initial Cost of Land				1,194,223
Initial Cost of Buildings				4,201,881
Costs Capitalized Subsequent to Acquisition				77,652
Land and Improvements				1,194,223
Building and Improvements				4,279,534
Gross Amount Carried at End of Period	$ 5,473,757			5,473,757
Accumulated Depreciation	$ 424,062			424,062
Date of Construction or Acquisition	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,473,757
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 424,062
Operating Properties [Member] | 901 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Addison, IL
Encumbrances				0
Initial Cost of Land				2,055,066
Initial Cost of Buildings				5,984,093
Costs Capitalized Subsequent to Acquisition				863,926
Land and Improvements				2,055,066
Building and Improvements				6,848,019
Gross Amount Carried at End of Period	$ 8,903,085			8,903,085
Accumulated Depreciation	$ 691,088			691,088
Date of Construction or Acquisition	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,903,085
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 691,088
Operating Properties [Member] | 8620 Congdon Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Alburtis, PA
Encumbrances				0
Initial Cost of Land				38,328,000
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				36,272,373
Land and Improvements				38,328,000
Building and Improvements				36,272,373
Gross Amount Carried at End of Period	$ 74,600,373			74,600,373
Accumulated Depreciation	$ 176,452			176,452
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 74,600,373
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 176,452
Operating Properties [Member] | 200 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				4,722,683
Initial Cost of Buildings				18,922,645
Costs Capitalized Subsequent to Acquisition				942,589
Land and Improvements				4,722,683
Building and Improvements				19,865,234
Gross Amount Carried at End of Period	$ 24,587,917			24,587,917
Accumulated Depreciation	$ 6,156,414			6,156,414
Date of Construction or Acquisition	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 24,587,917
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 6,156,414
Operating Properties [Member] | 250 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				3,599,936
Initial Cost of Buildings				12,099,145
Costs Capitalized Subsequent to Acquisition				2,149,322
Land and Improvements				3,717,733
Building and Improvements				14,130,670
Gross Amount Carried at End of Period	$ 17,848,403			17,848,403
Accumulated Depreciation	$ 5,107,522			5,107,522
Date of Construction or Acquisition	2000
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	$ 5,107,522
Operating Properties [Member] | 400 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				8,065,500
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				27,983,513
Land and Improvements				8,184,096
Building and Improvements				27,864,917
Gross Amount Carried at End of Period	$ 36,049,013			36,049,013
Accumulated Depreciation	$ 14,944,604			14,944,604
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 36,049,013
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 14,944,604
Operating Properties [Member] | 650 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				5,208,248
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				32,429,833
Land and Improvements				9,961,788
Building and Improvements				27,676,293
Gross Amount Carried at End of Period	$ 37,638,081			37,638,081
Accumulated Depreciation	$ 9,833,900			9,833,900
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 37,638,081
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 9,833,900
Operating Properties [Member] | 651 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				4,308,646
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				17,844,894
Land and Improvements				4,308,646
Building and Improvements				17,844,894
Gross Amount Carried at End of Period	$ 22,153,540			22,153,540
Accumulated Depreciation	$ 8,892,782			8,892,782
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 22,153,540
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 8,892,782
Operating Properties [Member] | 700 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				3,473,120
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				20,222,715
Land and Improvements				4,174,970
Building and Improvements				19,520,865
Gross Amount Carried at End of Period	$ 23,695,835			23,695,835
Accumulated Depreciation	$ 10,529,674			10,529,674
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 23,695,835
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 10,529,674
Operating Properties [Member] | 705 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				10,594,027
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				28,813,401
Land and Improvements				10,596,767
Building and Improvements				28,810,661
Gross Amount Carried at End of Period	$ 39,407,428			39,407,428
Accumulated Depreciation	$ 14,298,681			14,298,681
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 39,407,428
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 14,298,681
Operating Properties [Member] | 7165 Ambassador Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				792,999
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,644,609
Land and Improvements				804,848
Building and Improvements				4,632,760
Gross Amount Carried at End of Period	$ 5,437,608			5,437,608
Accumulated Depreciation	$ 2,031,336			2,031,336
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,437,608
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,031,336
Operating Properties [Member] | 7248 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				2,670,849
Initial Cost of Buildings				13,307,408
Costs Capitalized Subsequent to Acquisition				4,759,556
Land and Improvements				2,670,673
Building and Improvements				18,067,140
Gross Amount Carried at End of Period	$ 20,737,813			20,737,813
Accumulated Depreciation	$ 9,018,935			9,018,935
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 20,737,813
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 9,018,935
Operating Properties [Member] | 7339 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				1,187,776
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,592,257
Land and Improvements				1,197,447
Building and Improvements				7,582,586
Gross Amount Carried at End of Period	$ 8,780,033			8,780,033
Accumulated Depreciation	$ 3,913,214			3,913,214
Date of Construction or Acquisition	2013
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	$ 3,913,214
Operating Properties [Member] | 7437 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				717,488
Initial Cost of Buildings				5,022,413
Costs Capitalized Subsequent to Acquisition				3,449,601
Land and Improvements				726,651
Building and Improvements				8,462,850
Gross Amount Carried at End of Period	$ 9,189,501			9,189,501
Accumulated Depreciation	$ 5,213,645			5,213,645
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,189,501
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 5,213,645
Operating Properties [Member] | 8014 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				4,019,258
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				10,000,352
Land and Improvements				3,645,117
Building and Improvements				10,374,493
Gross Amount Carried at End of Period	$ 14,019,610			14,019,610
Accumulated Depreciation	$ 5,143,974			5,143,974
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 14,019,610
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 5,143,974
Operating Properties [Member] | 8150 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				2,564,167
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				9,479,952
Land and Improvements				2,571,466
Building and Improvements				9,472,653
Gross Amount Carried at End of Period	$ 12,044,119			12,044,119
Accumulated Depreciation	$ 3,528,379			3,528,379
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,044,119
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,528,379
Operating Properties [Member] | 8250 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				1,025,667
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,066,872
Land and Improvements				1,035,854
Building and Improvements				5,056,685
Gross Amount Carried at End of Period	$ 6,092,539			6,092,539
Accumulated Depreciation	$ 1,799,894			1,799,894
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,092,539
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,799,894
Operating Properties [Member] | 8400 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				6,725,948
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				27,402,564
Land and Improvements				7,521,211
Building and Improvements				26,607,301
Gross Amount Carried at End of Period	$ 34,128,512			34,128,512
Accumulated Depreciation	$ 7,412,738			7,412,738
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 34,128,512
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 7,412,738
Operating Properties [Member] | 6330 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				531,268
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,074,622
Land and Improvements				532,047
Building and Improvements				6,073,843
Gross Amount Carried at End of Period	$ 6,605,890			6,605,890
Accumulated Depreciation	$ 3,836,591			3,836,591
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,605,890
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,836,591
Operating Properties [Member] | 6350 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				360,027
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,526,060
Land and Improvements				560,691
Building and Improvements				4,325,396
Gross Amount Carried at End of Period	$ 4,886,087			4,886,087
Accumulated Depreciation	$ 2,458,586			2,458,586
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,886,087
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,458,586
Operating Properties [Member] | 6370 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				540,795
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,121,035
Land and Improvements				541,459
Building and Improvements				4,120,371
Gross Amount Carried at End of Period	$ 4,661,830			4,661,830
Accumulated Depreciation	$ 2,427,731			2,427,731
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,661,830
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,427,731
Operating Properties [Member] | 6390 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				707,203
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,138,461
Land and Improvements				707,867
Building and Improvements				3,137,797
Gross Amount Carried at End of Period	$ 3,845,664			3,845,664
Accumulated Depreciation	$ 1,903,126			1,903,126
Date of Construction or Acquisition	1995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,845,664
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,903,126
Operating Properties [Member] | 6520 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				453,315
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				1,873,771
Land and Improvements				484,361
Building and Improvements				1,842,725
Gross Amount Carried at End of Period	$ 2,327,086			2,327,086
Accumulated Depreciation	$ 1,050,115			1,050,115
Date of Construction or Acquisition	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,327,086
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,050,115
Operating Properties [Member] | 6540 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				422,042
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,271,389
Land and Improvements				422,730
Building and Improvements				5,270,701
Gross Amount Carried at End of Period	$ 5,693,431			5,693,431
Accumulated Depreciation	$ 2,904,488			2,904,488
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,693,431
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,904,488
Operating Properties [Member] | 6560 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				458,281
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,812,638
Land and Improvements				458,945
Building and Improvements				3,811,974
Gross Amount Carried at End of Period	$ 4,270,919			4,270,919
Accumulated Depreciation	$ 2,117,790			2,117,790
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,270,919
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,117,790
Operating Properties [Member] | 6580 Snowdrift Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				388,328
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,876,767
Land and Improvements				389,081
Building and Improvements				4,876,014
Gross Amount Carried at End of Period	$ 5,265,095			5,265,095
Accumulated Depreciation	$ 3,025,010			3,025,010
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,265,095
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,025,010
Operating Properties [Member] | 7620 Cetronia Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				1,091,806
Initial Cost of Buildings				3,851,456
Costs Capitalized Subsequent to Acquisition				445,980
Land and Improvements				1,093,724
Building and Improvements				4,295,518
Gross Amount Carried at End of Period	$ 5,389,242			5,389,242
Accumulated Depreciation	$ 2,265,098			2,265,098
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,389,242
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,265,098
Operating Properties [Member] | 700 Uline Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				26,311,300
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				75,988,219
Land and Improvements				30,712,602
Building and Improvements				71,586,917
Gross Amount Carried at End of Period	$ 102,299,519			102,299,519
Accumulated Depreciation	$ 519,191			519,191
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 102,299,519
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 519,191
Operating Properties [Member] | 11222 Melrose Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Franklin Park, IL
Encumbrances				0
Initial Cost of Land				2,999,106
Initial Cost of Buildings				4,658,605
Costs Capitalized Subsequent to Acquisition				153,158
Land and Improvements				2,999,106
Building and Improvements				4,811,763
Gross Amount Carried at End of Period	$ 7,810,869			7,810,869
Accumulated Depreciation	$ 127,245			127,245
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,810,869
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 127,245
Operating Properties [Member] | 3095 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Atlanta, GA
Encumbrances				0
Initial Cost of Land				200,351
Initial Cost of Buildings				1,729,161
Costs Capitalized Subsequent to Acquisition				244,810
Land and Improvements				200,351
Building and Improvements				1,973,971
Gross Amount Carried at End of Period	$ 2,174,322			2,174,322
Accumulated Depreciation	$ 244,124			244,124
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,174,322
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 244,124
Operating Properties [Member] | 3097 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Atlanta, GA
Encumbrances				0
Initial Cost of Land				188,680
Initial Cost of Buildings				1,721,048
Costs Capitalized Subsequent to Acquisition				166,204
Land and Improvements				188,680
Building and Improvements				1,887,252
Gross Amount Carried at End of Period	$ 2,075,932			2,075,932
Accumulated Depreciation	$ 203,086			203,086
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,075,932
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 203,086
Operating Properties [Member] | 7030 Buford Highway NE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Atlanta, GA
Encumbrances				0
Initial Cost of Land				919,850
Initial Cost of Buildings				4,051,340
Costs Capitalized Subsequent to Acquisition				937,692
Land and Improvements				919,850
Building and Improvements				4,989,032
Gross Amount Carried at End of Period	$ 5,908,882			5,908,882
Accumulated Depreciation	$ 646,951			646,951
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,908,882
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 646,951
Operating Properties [Member] | Barton 150 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Barton Under Needwood, UK
Encumbrances				0
Initial Cost of Land				2,196,955
Initial Cost of Buildings				13,643,981
Costs Capitalized Subsequent to Acquisition				(4,029,838)
Land and Improvements				1,638,063
Building and Improvements				10,173,035
Gross Amount Carried at End of Period	$ 11,811,098			11,811,098
Accumulated Depreciation	$ 995,308			995,308
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,811,098
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 995,308
Operating Properties [Member] | 1055-1071 Kingsland Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Batavia, IL
Encumbrances				0
Initial Cost of Land				727,294
Initial Cost of Buildings				2,367,529
Costs Capitalized Subsequent to Acquisition				686,568
Land and Improvements				727,294
Building and Improvements				3,054,097
Gross Amount Carried at End of Period	$ 3,781,391			3,781,391
Accumulated Depreciation	$ 366,744			366,744
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,781,391
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 366,744
Operating Properties [Member] | 4606 Richlynn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Belcamp, MD
Encumbrances				0
Initial Cost of Land				299,600
Initial Cost of Buildings				1,818,861
Costs Capitalized Subsequent to Acquisition				712,788
Land and Improvements				299,600
Building and Improvements				2,531,649
Gross Amount Carried at End of Period	$ 2,831,249			2,831,249
Accumulated Depreciation	$ 1,104,502			1,104,502
Date of Construction or Acquisition	2013
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	$ 1,104,502
Operating Properties [Member] | 11800 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Beltsville,MD
Encumbrances				0
Initial Cost of Land				2,769,962
Initial Cost of Buildings				1,829,028
Costs Capitalized Subsequent to Acquisition				278,794
Land and Improvements				2,663,725
Building and Improvements				2,214,060
Gross Amount Carried at End of Period	$ 4,877,785			4,877,785
Accumulated Depreciation	$ 313,325			313,325
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,877,785
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 313,325
Operating Properties [Member] | 11850 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Beltsville,MD
Encumbrances				0
Initial Cost of Land				3,595,044
Initial Cost of Buildings				2,415,132
Costs Capitalized Subsequent to Acquisition				145,949
Land and Improvements				3,457,162
Building and Improvements				2,698,963
Gross Amount Carried at End of Period	$ 6,156,125			6,156,125
Accumulated Depreciation	$ 477,203			477,203
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,156,125
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 477,203
Operating Properties [Member] | 11900 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Beltsville,MD
Encumbrances				0
Initial Cost of Land				3,492,036
Initial Cost of Buildings				2,024,038
Costs Capitalized Subsequent to Acquisition				366,205
Land and Improvements				3,358,104
Building and Improvements				2,524,175
Gross Amount Carried at End of Period	$ 5,882,279			5,882,279
Accumulated Depreciation	$ 524,742			524,742
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,882,279
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 524,742
Operating Properties [Member] | 12104 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Beltsville,MD
Encumbrances				0
Initial Cost of Land				2,021,752
Initial Cost of Buildings				2,503,802
Costs Capitalized Subsequent to Acquisition				397,174
Land and Improvements				2,021,752
Building and Improvements				2,900,976
Gross Amount Carried at End of Period	$ 4,922,728			4,922,728
Accumulated Depreciation	$ 581,288			581,288
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,922,728
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 581,288
Operating Properties [Member] | 12200 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Beltsville,MD
Encumbrances				0
Initial Cost of Land				1,347,882
Initial Cost of Buildings				1,460,291
Costs Capitalized Subsequent to Acquisition				614,057
Land and Improvements				1,347,882
Building and Improvements				2,074,348
Gross Amount Carried at End of Period	$ 3,422,230			3,422,230
Accumulated Depreciation	$ 266,439			266,439
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,422,230
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 266,439
Operating Properties [Member] | 12240 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Beltsville,MD
Encumbrances				0
Initial Cost of Land				1,479,307
Initial Cost of Buildings				2,159,997
Costs Capitalized Subsequent to Acquisition				781,160
Land and Improvements				1,479,307
Building and Improvements				2,941,158
Gross Amount Carried at End of Period	$ 4,420,465			4,420,465
Accumulated Depreciation	$ 343,319			343,319
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,420,465
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 343,319
Operating Properties [Member] | 1071 Thorndale Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Bensenville,IL
Encumbrances				0
Initial Cost of Land				2,173,006
Initial Cost of Buildings				2,280,788
Costs Capitalized Subsequent to Acquisition				279,776
Land and Improvements				2,016,715
Building and Improvements				2,716,855
Gross Amount Carried at End of Period	$ 4,733,570			4,733,570
Accumulated Depreciation	$ 362,273			362,273
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,733,570
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 362,273
Operating Properties [Member] | 1260-1274 Ellis Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Bensenville,IL
Encumbrances				0
Initial Cost of Land				2,298,560
Initial Cost of Buildings				4,020,382
Costs Capitalized Subsequent to Acquisition				360,126
Land and Improvements				2,298,560
Building and Improvements				4,380,508
Gross Amount Carried at End of Period	$ 6,679,068			6,679,068
Accumulated Depreciation	$ 578,737			578,737
Date of Construction or Acquisition	2008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,679,068
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 578,737
Operating Properties [Member] | 371-377 Meyer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Bensenville,IL
Encumbrances				0
Initial Cost of Land				1,903,423
Initial Cost of Buildings				3,563,953
Costs Capitalized Subsequent to Acquisition				264,360
Land and Improvements				1,903,423
Building and Improvements				3,828,313
Gross Amount Carried at End of Period	$ 5,731,736			5,731,736
Accumulated Depreciation	$ 478,694			478,694
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,731,736
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 478,694
Operating Properties [Member] | 850-880 Devon Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Bensenville,IL
Encumbrances				0
Initial Cost of Land				2,958,756
Initial Cost of Buildings				7,959,013
Costs Capitalized Subsequent to Acquisition				780,065
Land and Improvements				2,958,756
Building and Improvements				8,739,078
Gross Amount Carried at End of Period	$ 11,697,834			11,697,834
Accumulated Depreciation	$ 1,049,558			1,049,558
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,697,834
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,049,558
Operating Properties [Member] | 10 Emery Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Bethlehem, PA
Encumbrances				0
Initial Cost of Land				5,591,216
Initial Cost of Buildings				32,941,818
Costs Capitalized Subsequent to Acquisition				7,265,580
Land and Improvements				8,947,574
Building and Improvements				36,851,040
Gross Amount Carried at End of Period	$ 45,798,614			45,798,614
Accumulated Depreciation	$ 2,929,841			2,929,841
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 45,798,614
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,929,841
Operating Properties [Member] | 2785 Commerce Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Bethlehem, PA
Encumbrances				0
Initial Cost of Land				11,961,623
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				46,707,077
Land and Improvements				12,009,985
Building and Improvements				46,658,715
Gross Amount Carried at End of Period	$ 58,668,700			58,668,700
Accumulated Depreciation	$ 4,358,917			4,358,917
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 58,668,700
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 4,358,917
Operating Properties [Member] | 1455 Remington Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Bolingbrook, IL
Encumbrances				0
Initial Cost of Land				2,501,294
Initial Cost of Buildings				10,704,719
Costs Capitalized Subsequent to Acquisition				1,170
Land and Improvements				2,501,294
Building and Improvements				10,705,889
Gross Amount Carried at End of Period	$ 13,207,183			13,207,183
Accumulated Depreciation	$ 1,169,697			1,169,697
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,207,183
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,169,697
Operating Properties [Member] | 150 E Crossroads Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Bolingbrook, IL
Encumbrances				0
Initial Cost of Land				3,078,949
Initial Cost of Buildings				14,143,377
Costs Capitalized Subsequent to Acquisition				1,124,578
Land and Improvements				3,078,949
Building and Improvements				15,267,955
Gross Amount Carried at End of Period	$ 18,346,904			18,346,904
Accumulated Depreciation	$ 1,712,589			1,712,589
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 18,346,904
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,712,589
Operating Properties [Member] | 553 S Joliet Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Bolingbrook, IL
Encumbrances				0
Initial Cost of Land				3,764,831
Initial Cost of Buildings				15,109,947
Costs Capitalized Subsequent to Acquisition				1,469,069
Land and Improvements				3,764,831
Building and Improvements				16,579,016
Gross Amount Carried at End of Period	$ 20,343,847			20,343,847
Accumulated Depreciation	$ 2,205,965			2,205,965
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 20,343,847
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,205,965
Operating Properties [Member] | 400 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Breinigsville, PA
Encumbrances				0
Initial Cost of Land				2,859,106
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				10,599,615
Land and Improvements				2,865,575
Building and Improvements				10,593,146
Gross Amount Carried at End of Period	$ 13,458,721			13,458,721
Accumulated Depreciation	$ 3,358,912			3,358,912
Date of Construction or Acquisition	2013
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	$ 3,358,912
Operating Properties [Member] | 8201 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Breinigsville, PA
Encumbrances				0
Initial Cost of Land				2,089,719
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				8,353,910
Land and Improvements				2,222,168
Building and Improvements				8,221,461
Gross Amount Carried at End of Period	$ 10,443,629			10,443,629
Accumulated Depreciation	$ 2,235,927			2,235,927
Date of Construction or Acquisition	2013
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	$ 2,235,927
Operating Properties [Member] | 8500 Industrial Bouldvard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Breinigsville, PA
Encumbrances				0
Initial Cost of Land				8,752,708
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				40,133,665
Land and Improvements				11,511,499
Building and Improvements				37,374,874
Gross Amount Carried at End of Period	$ 48,886,373			48,886,373
Accumulated Depreciation	$ 10,316,766			10,316,766
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 48,886,373
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 10,316,766
Operating Properties [Member] | 860 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Breinigsville, PA
Encumbrances				0
Initial Cost of Land				8,118,881
Initial Cost of Buildings				18,885,486
Costs Capitalized Subsequent to Acquisition				7,520,945
Land and Improvements				8,118,881
Building and Improvements				26,406,431
Gross Amount Carried at End of Period	$ 34,525,312			34,525,312
Accumulated Depreciation	$ 9,758,985			9,758,985
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 34,525,312
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 9,758,985
Operating Properties [Member] | 1485 W Commerce Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Carlisle, PA
Encumbrances				0
Initial Cost of Land				4,249,868
Initial Cost of Buildings				13,886,039
Costs Capitalized Subsequent to Acquisition				2,344,063
Land and Improvements				4,095,262
Building and Improvements				16,384,708
Gross Amount Carried at End of Period	$ 20,479,970			20,479,970
Accumulated Depreciation	$ 6,463,352			6,463,352
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 20,479,970
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 6,463,352
Operating Properties [Member] | 40 Logistics Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Carlisle, PA
Encumbrances				0
Initial Cost of Land				7,981,850
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				33,016,988
Land and Improvements				8,081,272
Building and Improvements				32,917,566
Gross Amount Carried at End of Period	$ 40,998,838			40,998,838
Accumulated Depreciation	$ 4,140,856			4,140,856
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 40,998,838
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 4,140,856
Operating Properties [Member] | 135-195 East Elk Trail [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Carol Stream, IL
Encumbrances				0
Initial Cost of Land				4,873,094
Initial Cost of Buildings				12,430,320
Costs Capitalized Subsequent to Acquisition				2,229,287
Land and Improvements				4,873,094
Building and Improvements				14,659,607
Gross Amount Carried at End of Period	$ 19,532,701			19,532,701
Accumulated Depreciation	$ 1,144,752			1,144,752
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 19,532,701
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,144,752
Operating Properties [Member] | 515 Kehoe Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Carol Stream, IL
Encumbrances				0
Initial Cost of Land				5,523,427
Initial Cost of Buildings				14,581,705
Costs Capitalized Subsequent to Acquisition				1,016,882
Land and Improvements				5,523,427
Building and Improvements				15,598,587
Gross Amount Carried at End of Period	$ 21,122,014			21,122,014
Accumulated Depreciation	$ 1,366,471			1,366,471
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 21,122,014
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,366,471
Operating Properties [Member] | 1413 Bradley Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Carrollton, TX
Encumbrances				0
Initial Cost of Land				247,477
Initial Cost of Buildings				2,028,322
Costs Capitalized Subsequent to Acquisition				83,523
Land and Improvements				247,477
Building and Improvements				2,111,845
Gross Amount Carried at End of Period	$ 2,359,322			2,359,322
Accumulated Depreciation	$ 256,594			256,594
Date of Construction or Acquisition	2005
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	$ 256,594
Operating Properties [Member] | 3200 Belmeade Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Carrollton, TX
Encumbrances				0
Initial Cost of Land				1,042,453
Initial Cost of Buildings				8,027,974
Costs Capitalized Subsequent to Acquisition				424,957
Land and Improvements				1,042,453
Building and Improvements				8,452,931
Gross Amount Carried at End of Period	$ 9,495,384			9,495,384
Accumulated Depreciation	$ 917,970			917,970
Date of Construction or Acquisition	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,495,384
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 917,970
Operating Properties [Member] | 1475 Nitterhouse Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Chambersburg, PA
Encumbrances				0
Initial Cost of Land				7,081,007
Initial Cost of Buildings				39,002,011
Costs Capitalized Subsequent to Acquisition				2,091,556
Land and Improvements				7,081,007
Building and Improvements				41,093,567
Gross Amount Carried at End of Period	$ 48,174,574			48,174,574
Accumulated Depreciation	$ 4,663,680			4,663,680
Date of Construction or Acquisition	2001
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	$ 4,663,680
Operating Properties [Member] | 95 Kriner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Chambersburg, PA
Encumbrances				0
Initial Cost of Land				8,695,501
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				35,058,041
Land and Improvements				9,407,871
Building and Improvements				34,345,671
Gross Amount Carried at End of Period	$ 43,753,542			43,753,542
Accumulated Depreciation	$ 8,074,404			8,074,404
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 43,753,542
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 8,074,404
Operating Properties [Member] | 9000 109th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Champlin, MN
Encumbrances				0
Initial Cost of Land				1,251,043
Initial Cost of Buildings				11,662,995
Costs Capitalized Subsequent to Acquisition				119,919
Land and Improvements				1,251,043
Building and Improvements				11,782,914
Gross Amount Carried at End of Period	$ 13,033,957			13,033,957
Accumulated Depreciation	$ 1,803,401			1,803,401
Date of Construction or Acquisition	1995
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	$ 1,803,401
Operating Properties [Member] | 11701 Goodrich Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				2,054,621
Initial Cost of Buildings				6,356,151
Costs Capitalized Subsequent to Acquisition				847,042
Land and Improvements				2,054,621
Building and Improvements				7,203,192
Gross Amount Carried at End of Period	$ 9,257,813			9,257,813
Accumulated Depreciation	$ 1,429,290			1,429,290
Date of Construction or Acquisition	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,257,813
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,429,290
Operating Properties [Member] | 12810 Virkler Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				475,368
Initial Cost of Buildings				2,367,586
Costs Capitalized Subsequent to Acquisition				803,884
Land and Improvements				476,262
Building and Improvements				3,170,575
Gross Amount Carried at End of Period	$ 3,646,837			3,646,837
Accumulated Depreciation	$ 469,072			469,072
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,646,837
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 469,072
Operating Properties [Member] | 2700 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				912,500
Initial Cost of Buildings				4,721,259
Costs Capitalized Subsequent to Acquisition				322,907
Land and Improvements				912,500
Building and Improvements				5,044,166
Gross Amount Carried at End of Period	$ 5,956,666			5,956,666
Accumulated Depreciation	$ 771,151			771,151
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,956,666
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 771,151
Operating Properties [Member] | 2701 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				1,275,000
Initial Cost of Buildings				4,649,750
Costs Capitalized Subsequent to Acquisition				630,260
Land and Improvements				1,275,000
Building and Improvements				5,280,010
Gross Amount Carried at End of Period	$ 6,555,010			6,555,010
Accumulated Depreciation	$ 846,716			846,716
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,555,010
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 846,716
Operating Properties [Member] | 2730 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				1,878,750
Initial Cost of Buildings				10,129,499
Costs Capitalized Subsequent to Acquisition				32,484
Land and Improvements				1,878,750
Building and Improvements				10,161,983
Gross Amount Carried at End of Period	$ 12,040,733			12,040,733
Accumulated Depreciation	$ 1,440,018			1,440,018
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,040,733
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,440,018
Operating Properties [Member] | 2801 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				1,065,000
Initial Cost of Buildings				6,975,250
Costs Capitalized Subsequent to Acquisition				605,167
Land and Improvements				1,065,000
Building and Improvements				7,580,417
Gross Amount Carried at End of Period	$ 8,645,417			8,645,417
Accumulated Depreciation	$ 1,104,601			1,104,601
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,645,417
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,104,601
Operating Properties [Member] | 3000 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				1,831,250
Initial Cost of Buildings				10,779,412
Costs Capitalized Subsequent to Acquisition				1,100,142
Land and Improvements				1,831,250
Building and Improvements				11,879,554
Gross Amount Carried at End of Period	$ 13,710,804			13,710,804
Accumulated Depreciation	$ 1,710,855			1,710,855
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,710,804
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,710,855
Operating Properties [Member] | 3005 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				1,990,000
Initial Cost of Buildings				6,561,540
Costs Capitalized Subsequent to Acquisition				1,171,719
Land and Improvements				1,990,000
Building and Improvements				7,733,259
Gross Amount Carried at End of Period	$ 9,723,259			9,723,259
Accumulated Depreciation	$ 1,040,722			1,040,722
Date of Construction or Acquisition	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,723,259
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,040,722
Operating Properties [Member] | 4045 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				1,418,928
Initial Cost of Buildings				7,511,050
Costs Capitalized Subsequent to Acquisition				183,383
Land and Improvements				1,418,928
Building and Improvements				7,694,433
Gross Amount Carried at End of Period	$ 9,113,361			9,113,361
Accumulated Depreciation	$ 1,198,063			1,198,063
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,113,361
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,198,063
Operating Properties [Member] | 4047 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				1,279,004
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,399,096
Land and Improvements				1,279,004
Building and Improvements				6,399,096
Gross Amount Carried at End of Period	$ 7,678,100			7,678,100
Accumulated Depreciation	$ 886,370			886,370
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,678,100
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 886,370
Operating Properties [Member] | 4525 Statesville Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				841,250
Initial Cost of Buildings				5,279,315
Costs Capitalized Subsequent to Acquisition				316,750
Land and Improvements				837,144
Building and Improvements				5,600,171
Gross Amount Carried at End of Period	$ 6,437,315			6,437,315
Accumulated Depreciation	$ 807,037			807,037
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,437,315
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 807,037
Operating Properties [Member] | 4835 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				3,429,062
Initial Cost of Land				690,750
Initial Cost of Buildings				5,086,388
Costs Capitalized Subsequent to Acquisition				132,973
Land and Improvements				690,750
Building and Improvements				5,219,361
Gross Amount Carried at End of Period	$ 5,910,111			5,910,111
Accumulated Depreciation	$ 618,965			618,965
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,910,111
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 618,965
Operating Properties [Member] | 4925 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				3,445,719
Initial Cost of Land				603,003
Initial Cost of Buildings				4,969,011
Costs Capitalized Subsequent to Acquisition				146,835
Land and Improvements				603,003
Building and Improvements				5,115,846
Gross Amount Carried at End of Period	$ 5,718,849			5,718,849
Accumulated Depreciation	$ 686,589			686,589
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,718,849
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 686,589
Operating Properties [Member] | 5032 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				1,416,763
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				9,029,649
Land and Improvements				1,416,763
Building and Improvements				9,029,649
Gross Amount Carried at End of Period	$ 10,446,412			10,446,412
Accumulated Depreciation	$ 162,570			162,570
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 10,446,412
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 162,570
Operating Properties [Member] | 5033 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				2,931,771
Initial Cost of Land				509,247
Initial Cost of Buildings				4,710,218
Costs Capitalized Subsequent to Acquisition				183,541
Land and Improvements				613,962
Building and Improvements				4,789,044
Gross Amount Carried at End of Period	$ 5,403,006			5,403,006
Accumulated Depreciation	$ 605,740			605,740
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,403,006
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 605,740
Operating Properties [Member] | 5039 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				1,027,500
Initial Cost of Buildings				6,172,807
Costs Capitalized Subsequent to Acquisition				62,651
Land and Improvements				1,027,500
Building and Improvements				6,235,458
Gross Amount Carried at End of Period	$ 7,262,958			7,262,958
Accumulated Depreciation	$ 354,708			354,708
Date of Construction or Acquisition	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,262,958
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 354,708
Operating Properties [Member] | 8910 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				527,873
Initial Cost of Buildings				4,959,206
Costs Capitalized Subsequent to Acquisition				287,144
Land and Improvements				527,873
Building and Improvements				5,246,350
Gross Amount Carried at End of Period	$ 5,774,223			5,774,223
Accumulated Depreciation	$ 648,191			648,191
Date of Construction or Acquisition	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,774,223
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 648,191
Operating Properties [Member] | 8916 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				557,730
Initial Cost of Buildings				5,785,333
Costs Capitalized Subsequent to Acquisition				461,744
Land and Improvements				557,730
Building and Improvements				6,247,077
Gross Amount Carried at End of Period	$ 6,804,807			6,804,807
Accumulated Depreciation	$ 923,373			923,373
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,804,807
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 923,373
Operating Properties [Member] | 8924 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				654,713
Initial Cost of Buildings				5,365,823
Costs Capitalized Subsequent to Acquisition				0
Land and Improvements				654,713
Building and Improvements				5,365,823
Gross Amount Carried at End of Period	$ 6,020,536			6,020,536
Accumulated Depreciation	$ 5,466			5,466
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,020,536
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 5,466
Operating Properties [Member] | 2601 Indian River Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Chesapeake, VA
Encumbrances				0
Initial Cost of Land				1,711,746
Initial Cost of Buildings				10,418,032
Costs Capitalized Subsequent to Acquisition				460,727
Land and Improvements				1,711,746
Building and Improvements				10,878,759
Gross Amount Carried at End of Period	$ 12,590,505			12,590,505
Accumulated Depreciation	$ 1,250,668			1,250,668
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,590,505
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,250,668
Operating Properties [Member] | 1540 S 54th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Cicero, IL
Encumbrances				0
Initial Cost of Land				3,540,236
Initial Cost of Buildings				20,130,552
Costs Capitalized Subsequent to Acquisition				928,916
Land and Improvements				3,540,236
Building and Improvements				21,059,468
Gross Amount Carried at End of Period	$ 24,599,704			24,599,704
Accumulated Depreciation	$ 2,292,856			2,292,856
Date of Construction or Acquisition	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 24,599,704
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,292,856
Operating Properties [Member] | 4650 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Cincinnati, OH
Encumbrances				0
Initial Cost of Land				1,030,242
Initial Cost of Buildings				4,003,024
Costs Capitalized Subsequent to Acquisition				224,716
Land and Improvements				1,030,242
Building and Improvements				4,227,739
Gross Amount Carried at End of Period	$ 5,257,981			5,257,981
Accumulated Depreciation	$ 516,067			516,067
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,257,981
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 516,067
Operating Properties [Member] | 4750 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Cincinnati, OH
Encumbrances				0
Initial Cost of Land				1,138,166
Initial Cost of Buildings				5,914,789
Costs Capitalized Subsequent to Acquisition				230,172
Land and Improvements				1,138,166
Building and Improvements				6,144,961
Gross Amount Carried at End of Period	$ 7,283,127			7,283,127
Accumulated Depreciation	$ 729,876			729,876
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,283,127
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 729,876
Operating Properties [Member] | 9645 Gerwig Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Columbia, MD
Encumbrances				0
Initial Cost of Land				1,915,960
Initial Cost of Buildings				6,461,228
Costs Capitalized Subsequent to Acquisition				320,391
Land and Improvements				1,915,960
Building and Improvements				6,781,619
Gross Amount Carried at End of Period	$ 8,697,579			8,697,579
Accumulated Depreciation	$ 838,295			838,295
Date of Construction or Acquisition	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	$ 838,295
Operating Properties [Member] | 2550 John Glenn Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Columbus, OH
Encumbrances				0
Initial Cost of Land				540,601
Initial Cost of Buildings				5,129,342
Costs Capitalized Subsequent to Acquisition				835,318
Land and Improvements				540,601
Building and Improvements				5,964,660
Gross Amount Carried at End of Period	$ 6,505,261			6,505,261
Accumulated Depreciation	$ 600,700			600,700
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,505,261
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 600,700
Operating Properties [Member] | 3800 Twin Creeks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Columbus, OH
Encumbrances				0
Initial Cost of Land				549,393
Initial Cost of Buildings				4,643,302
Costs Capitalized Subsequent to Acquisition				499,543
Land and Improvements				549,393
Building and Improvements				5,142,845
Gross Amount Carried at End of Period	$ 5,692,238			5,692,238
Accumulated Depreciation	$ 538,373			538,373
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,692,238
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 538,373
Operating Properties [Member] | 330 South Royal Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Coppell, TX
Encumbrances				0
Initial Cost of Land				2,091,426
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				11,402,325
Land and Improvements				2,091,426
Building and Improvements				11,402,325
Gross Amount Carried at End of Period	$ 13,493,751			13,493,751
Accumulated Depreciation	$ 463,175			463,175
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,493,751
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 463,175
Operating Properties [Member] | 455 Airline Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Coppell, TX
Encumbrances				0
Initial Cost of Land				312,701
Initial Cost of Buildings				2,311,531
Costs Capitalized Subsequent to Acquisition				742,190
Land and Improvements				312,701
Building and Improvements				3,053,721
Gross Amount Carried at End of Period	$ 3,366,422			3,366,422
Accumulated Depreciation	$ 587,157			587,157
Date of Construction or Acquisition	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	$ 587,157
Operating Properties [Member] | 2130 Baldwin Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Crofton, MD
Encumbrances				0
Initial Cost of Land				3,172,032
Initial Cost of Buildings				7,350,782
Costs Capitalized Subsequent to Acquisition				418,907
Land and Improvements				3,172,032
Building and Improvements				7,769,689
Gross Amount Carried at End of Period	$ 10,941,721			10,941,721
Accumulated Depreciation	$ 908,002			908,002
Date of Construction or Acquisition	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	$ 908,002
Operating Properties [Member] | 329-333 Herrod Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Dayton, NJ
Encumbrances				0
Initial Cost of Land				4,039,559
Initial Cost of Buildings				20,863,051
Costs Capitalized Subsequent to Acquisition				2,285,014
Land and Improvements				4,039,559
Building and Improvements				23,148,065
Gross Amount Carried at End of Period	$ 27,187,624			27,187,624
Accumulated Depreciation	$ 2,515,094			2,515,094
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 27,187,624
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,515,094
Operating Properties [Member] | 1250 Hall Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Deer Park, TX
Encumbrances				0
Initial Cost of Land				829,570
Initial Cost of Buildings				4,778,327
Costs Capitalized Subsequent to Acquisition				120,899
Land and Improvements				831,611
Building and Improvements				4,897,185
Gross Amount Carried at End of Period	$ 5,728,796			5,728,796
Accumulated Depreciation	$ 1,310,568			1,310,568
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,728,796
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,310,568
Operating Properties [Member] | 1680 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Duluth, GA
Encumbrances				0
Initial Cost of Land				1,928,412
Initial Cost of Buildings				4,651,819
Costs Capitalized Subsequent to Acquisition				573,627
Land and Improvements				1,928,412
Building and Improvements				5,225,446
Gross Amount Carried at End of Period	$ 7,153,858			7,153,858
Accumulated Depreciation	$ 831,701			831,701
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,153,858
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 831,701
Operating Properties [Member] | 1700 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Duluth, GA
Encumbrances				0
Initial Cost of Land				1,082,072
Initial Cost of Buildings				2,496,599
Costs Capitalized Subsequent to Acquisition				549,432
Land and Improvements				1,082,072
Building and Improvements				3,046,031
Gross Amount Carried at End of Period	$ 4,128,103			4,128,103
Accumulated Depreciation	$ 452,838			452,838
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,128,103
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 452,838
Operating Properties [Member] | 2670 Breckinridge Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Duluth, GA
Encumbrances				0
Initial Cost of Land				1,676,415
Initial Cost of Buildings				4,567,592
Costs Capitalized Subsequent to Acquisition				927,127
Land and Improvements				1,676,415
Building and Improvements				5,494,720
Gross Amount Carried at End of Period	$ 7,171,135			7,171,135
Accumulated Depreciation	$ 637,871			637,871
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,171,135
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 637,871
Operating Properties [Member] | 170 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Duncan, SC
Encumbrances				0
Initial Cost of Land				598,348
Initial Cost of Buildings				3,643,756
Costs Capitalized Subsequent to Acquisition				549,357
Land and Improvements				598,918
Building and Improvements				4,192,543
Gross Amount Carried at End of Period	$ 4,791,461			4,791,461
Accumulated Depreciation	$ 1,205,279			1,205,279
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,791,461
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,205,279
Operating Properties [Member] | 190 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Duncan, SC
Encumbrances				0
Initial Cost of Land				551,663
Initial Cost of Buildings				3,310,993
Costs Capitalized Subsequent to Acquisition				251,300
Land and Improvements				552,211
Building and Improvements				3,561,744
Gross Amount Carried at End of Period	$ 4,113,955			4,113,955
Accumulated Depreciation	$ 969,780			969,780
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,113,955
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 969,780
Operating Properties [Member] | 265 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Duncan, SC
Encumbrances				0
Initial Cost of Land				901,444
Initial Cost of Buildings				5,751,389
Costs Capitalized Subsequent to Acquisition				193,199
Land and Improvements				902,374
Building and Improvements				5,943,658
Gross Amount Carried at End of Period	$ 6,846,032			6,846,032
Accumulated Depreciation	$ 1,915,845			1,915,845
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,846,032
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,915,845
Operating Properties [Member] | 285 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Duncan, SC
Encumbrances				0
Initial Cost of Land				975,433
Initial Cost of Buildings				5,851,990
Costs Capitalized Subsequent to Acquisition				413,247
Land and Improvements				976,393
Building and Improvements				6,264,277
Gross Amount Carried at End of Period	$ 7,240,670			7,240,670
Accumulated Depreciation	$ 1,712,719			1,712,719
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,240,670
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,712,719
Operating Properties [Member] | 1000 Parliament Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Durham, NC
Encumbrances				0
Initial Cost of Land				2,229,000
Initial Cost of Buildings				7,064,506
Costs Capitalized Subsequent to Acquisition				603,830
Land and Improvements				2,229,000
Building and Improvements				7,668,336
Gross Amount Carried at End of Period	$ 9,897,336			9,897,336
Accumulated Depreciation	$ 534,490			534,490
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,897,336
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 534,490
Operating Properties [Member] | 4226 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Durham, NC
Encumbrances				0
Initial Cost of Land				1,440,000
Initial Cost of Buildings				7,932,265
Costs Capitalized Subsequent to Acquisition				163,047
Land and Improvements				1,440,000
Building and Improvements				8,095,312
Gross Amount Carried at End of Period	$ 9,535,312			9,535,312
Accumulated Depreciation	$ 763,084			763,084
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,535,312
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 763,084
Operating Properties [Member] | 4227 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Durham, NC
Encumbrances				0
Initial Cost of Land				1,500,000
Initial Cost of Buildings				5,624,030
Costs Capitalized Subsequent to Acquisition				214,857
Land and Improvements				1,500,000
Building and Improvements				5,838,886
Gross Amount Carried at End of Period	$ 7,338,886			7,338,886
Accumulated Depreciation	$ 378,331			378,331
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,338,886
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 378,331
Operating Properties [Member] | 4234 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Durham, NC
Encumbrances				0
Initial Cost of Land				1,440,000
Initial Cost of Buildings				7,356,161
Costs Capitalized Subsequent to Acquisition				(4,933)
Land and Improvements				1,440,000
Building and Improvements				7,351,228
Gross Amount Carried at End of Period	$ 8,791,228			8,791,228
Accumulated Depreciation	$ 649,580			649,580
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,791,228
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 649,580
Operating Properties [Member] | 4300 Emperor Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Durham, NC
Encumbrances				0
Initial Cost of Land				1,576,500
Initial Cost of Buildings				4,240,961
Costs Capitalized Subsequent to Acquisition				(8,916)
Land and Improvements				1,576,500
Building and Improvements				4,232,045
Gross Amount Carried at End of Period	$ 5,808,545			5,808,545
Accumulated Depreciation	$ 305,053			305,053
Date of Construction or Acquisition	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,808,545
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 305,053
Operating Properties [Member] | 1957 TW Alexander Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Durham, NC
Encumbrances				0
Initial Cost of Land				1,844,943
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,938,998
Land and Improvements				3,091,046
Building and Improvements				6,692,895
Gross Amount Carried at End of Period	$ 9,783,941			9,783,941
Accumulated Depreciation	$ 1,131			1,131
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,783,941
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,131
Operating Properties [Member] | 3169 Dodd Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eagan, MN
Encumbrances				0
Initial Cost of Land				988,594
Initial Cost of Buildings				6,586,907
Costs Capitalized Subsequent to Acquisition				6,464
Land and Improvements				988,594
Building and Improvements				6,593,371
Gross Amount Carried at End of Period	$ 7,581,965			7,581,965
Accumulated Depreciation	$ 928,496			928,496
Date of Construction or Acquisition	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,581,965
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 928,496
Operating Properties [Member] | 3711 Kennebec Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eagan, MN
Encumbrances				0
Initial Cost of Land				999,702
Initial Cost of Buildings				4,042,589
Costs Capitalized Subsequent to Acquisition				325,995
Land and Improvements				999,702
Building and Improvements				4,368,584
Gross Amount Carried at End of Period	$ 5,368,286			5,368,286
Accumulated Depreciation	$ 966,648			966,648
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,368,286
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 966,648
Operating Properties [Member] | 917 Lone Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eagan, MN
Encumbrances				0
Initial Cost of Land				1,493,115
Initial Cost of Buildings				6,120,455
Costs Capitalized Subsequent to Acquisition				609,183
Land and Improvements				1,493,115
Building and Improvements				6,729,638
Gross Amount Carried at End of Period	$ 8,222,753			8,222,753
Accumulated Depreciation	$ 873,373			873,373
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,222,753
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 873,373
Operating Properties [Member] | 10301-10305 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eden Prairie, MN
Encumbrances				0
Initial Cost of Land				120,622
Initial Cost of Buildings				1,085,226
Costs Capitalized Subsequent to Acquisition				310,312
Land and Improvements				118,300
Building and Improvements				1,397,860
Gross Amount Carried at End of Period	$ 1,516,160			1,516,160
Accumulated Depreciation	$ 643,228			643,228
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,516,160
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 643,228
Operating Properties [Member] | 10321 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eden Prairie, MN
Encumbrances				0
Initial Cost of Land				145,198
Initial Cost of Buildings				1,305,700
Costs Capitalized Subsequent to Acquisition				578,495
Land and Improvements				142,399
Building and Improvements				1,886,994
Gross Amount Carried at End of Period	$ 2,029,393			2,029,393
Accumulated Depreciation	$ 892,182			892,182
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,029,393
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 892,182
Operating Properties [Member] | 10333 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eden Prairie, MN
Encumbrances				0
Initial Cost of Land				110,746
Initial Cost of Buildings				995,868
Costs Capitalized Subsequent to Acquisition				285,802
Land and Improvements				108,610
Building and Improvements				1,283,806
Gross Amount Carried at End of Period	$ 1,392,416			1,392,416
Accumulated Depreciation	$ 611,942			611,942
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,392,416
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 611,942
Operating Properties [Member] | 10349-10357 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eden Prairie, MN
Encumbrances				0
Initial Cost of Land				275,903
Initial Cost of Buildings				2,481,666
Costs Capitalized Subsequent to Acquisition				900,007
Land and Improvements				270,584
Building and Improvements				3,386,992
Gross Amount Carried at End of Period	$ 3,657,576			3,657,576
Accumulated Depreciation	$ 1,712,016			1,712,016
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,657,576
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,712,016
Operating Properties [Member] | 10365-10375 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eden Prairie, MN
Encumbrances				0
Initial Cost of Land				291,077
Initial Cost of Buildings				2,618,194
Costs Capitalized Subsequent to Acquisition				1,530,128
Land and Improvements				285,464
Building and Improvements				4,153,935
Gross Amount Carried at End of Period	$ 4,439,399			4,439,399
Accumulated Depreciation	$ 1,737,212			1,737,212
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,439,399
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,737,212
Operating Properties [Member] | 10393-10394 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eden Prairie, MN
Encumbrances				0
Initial Cost of Land				269,618
Initial Cost of Buildings				2,423,318
Costs Capitalized Subsequent to Acquisition				2,269,368
Land and Improvements				264,419
Building and Improvements				4,697,885
Gross Amount Carried at End of Period	$ 4,962,304			4,962,304
Accumulated Depreciation	$ 1,895,959			1,895,959
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,962,304
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,895,959
Operating Properties [Member] | 7075 Flying Cloud Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eden Prairie, MN
Encumbrances				0
Initial Cost of Land				10,232,831
Initial Cost of Buildings				10,855,851
Costs Capitalized Subsequent to Acquisition				4,331,163
Land and Improvements				10,243,977
Building and Improvements				15,175,867
Gross Amount Carried at End of Period	$ 25,419,844			25,419,844
Accumulated Depreciation	$ 2,955,224			2,955,224
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 25,419,844
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,955,224
Operating Properties [Member] | 7078 Shady Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eden Prairie, MN
Encumbrances				0
Initial Cost of Land				343,093
Initial Cost of Buildings				3,085,795
Costs Capitalized Subsequent to Acquisition				1,528,369
Land and Improvements				336,481
Building and Improvements				4,620,776
Gross Amount Carried at End of Period	$ 4,957,257			4,957,257
Accumulated Depreciation	$ 2,436,859			2,436,859
Date of Construction or Acquisition	2013
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	$ 2,436,859
Operating Properties [Member] | 7777 Golden Triangle Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Eden Prairie, MN
Encumbrances				0
Initial Cost of Land				993,101
Initial Cost of Buildings				2,136,862
Costs Capitalized Subsequent to Acquisition				881,416
Land and Improvements				993,101
Building and Improvements				3,018,277
Gross Amount Carried at End of Period	$ 4,011,378			4,011,378
Accumulated Depreciation	$ 1,231,573			1,231,573
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,011,378
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,231,573
Operating Properties [Member] | 2250 Arthur Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Elk Grove, IL
Encumbrances				0
Initial Cost of Land				1,403,196
Initial Cost of Buildings				2,386,396
Costs Capitalized Subsequent to Acquisition				149,086
Land and Improvements				1,403,196
Building and Improvements				2,535,482
Gross Amount Carried at End of Period	$ 3,938,678			3,938,678
Accumulated Depreciation	$ 296,511			296,511
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,938,678
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 296,511
Operating Properties [Member] | 6600 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Elkridge, MD
Encumbrances				0
Initial Cost of Land				3,680,220
Initial Cost of Buildings				14,671,910
Costs Capitalized Subsequent to Acquisition				701,811
Land and Improvements				3,680,220
Building and Improvements				15,373,721
Gross Amount Carried at End of Period	$ 19,053,941			19,053,941
Accumulated Depreciation	$ 1,493,289			1,493,289
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 19,053,941
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,493,289
Operating Properties [Member] | 6675 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Elkridge, MD
Encumbrances				0
Initial Cost of Land				2,421,854
Initial Cost of Buildings				9,730,192
Costs Capitalized Subsequent to Acquisition				566,777
Land and Improvements				2,421,854
Building and Improvements				10,296,969
Gross Amount Carried at End of Period	$ 12,718,823			12,718,823
Accumulated Depreciation	$ 1,042,430			1,042,430
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,718,823
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,042,430
Operating Properties [Member] | 7351 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Elkridge, MD
Encumbrances				0
Initial Cost of Land				1,897,044
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,410,314
Land and Improvements				3,023,417
Building and Improvements				6,283,941
Gross Amount Carried at End of Period	$ 9,307,358			9,307,358
Accumulated Depreciation	$ 1,815,210			1,815,210
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,307,358
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,815,210
Operating Properties [Member] | 21705-21707 Mississippi Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Elwood, IL
Encumbrances				0
Initial Cost of Land				10,594,259
Initial Cost of Buildings				30,329,802
Costs Capitalized Subsequent to Acquisition				895,205
Land and Improvements				10,594,259
Building and Improvements				31,225,008
Gross Amount Carried at End of Period	$ 41,819,267			41,819,267
Accumulated Depreciation	$ 4,440,370			4,440,370
Date of Construction or Acquisition	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 41,819,267
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 4,440,370
Operating Properties [Member] | 27143 S Baseline Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Elwood, IL
Encumbrances				0
Initial Cost of Land				6,022,000
Initial Cost of Buildings				5,612,934
Costs Capitalized Subsequent to Acquisition				318,163
Land and Improvements				6,022,000
Building and Improvements				5,931,097
Gross Amount Carried at End of Period	$ 11,953,097			11,953,097
Accumulated Depreciation	$ 925,484			925,484
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,953,097
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 925,484
Operating Properties [Member] | 1800 Donaldson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Erlanger, KY
Encumbrances				0
Initial Cost of Land				0
Initial Cost of Buildings				13,211,604
Costs Capitalized Subsequent to Acquisition				709,891
Land and Improvements				0
Building and Improvements				13,921,495
Gross Amount Carried at End of Period	$ 13,921,495			13,921,495
Accumulated Depreciation	$ 3,004,403			3,004,403
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,921,495
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,004,403
Operating Properties [Member] | 6880 Fairfield Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Fairfield, OH
Encumbrances				0
Initial Cost of Land				412,136
Initial Cost of Buildings				3,029,177
Costs Capitalized Subsequent to Acquisition				155,862
Land and Improvements				412,136
Building and Improvements				3,185,039
Gross Amount Carried at End of Period	$ 3,597,175			3,597,175
Accumulated Depreciation	$ 340,785			340,785
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,597,175
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 340,785
Operating Properties [Member] | 7000-7018 Fairfield Business [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Fairfield, OH
Encumbrances				0
Initial Cost of Land				367,925
Initial Cost of Buildings				2,205,817
Costs Capitalized Subsequent to Acquisition				144,414
Land and Improvements				386,928
Building and Improvements				2,331,228
Gross Amount Carried at End of Period	$ 2,718,156			2,718,156
Accumulated Depreciation	$ 246,535			246,535
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,718,156
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 246,535
Operating Properties [Member] | 10721 Jasmine Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Fontana, CA
Encumbrances				0
Initial Cost of Land				11,427,061
Initial Cost of Buildings				23,784,779
Costs Capitalized Subsequent to Acquisition				2,353,817
Land and Improvements				11,427,061
Building and Improvements				26,138,596
Gross Amount Carried at End of Period	$ 37,565,657			37,565,657
Accumulated Depreciation	$ 1,035,397			1,035,397
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 37,565,657
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,035,397
Operating Properties [Member] | 2000 Southpointe Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Forest Park, GA
Encumbrances				0
Initial Cost of Land				756,221
Initial Cost of Buildings				9,115,626
Costs Capitalized Subsequent to Acquisition				626,719
Land and Improvements				756,221
Building and Improvements				9,742,345
Gross Amount Carried at End of Period	$ 10,498,566			10,498,566
Accumulated Depreciation	$ 1,116,707			1,116,707
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 10,498,566
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,116,707
Operating Properties [Member] | 1400 NW 65th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Fort Lauderdale, FL
Encumbrances				0
Initial Cost of Land				545,480
Initial Cost of Buildings				2,540,210
Costs Capitalized Subsequent to Acquisition				66,119
Land and Improvements				545,480
Building and Improvements				2,606,329
Gross Amount Carried at End of Period	$ 3,151,809			3,151,809
Accumulated Depreciation	259,627			259,627
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	$ 259,627
Operating Properties [Member] | 6500 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Fort Lauderdale, FL
Encumbrances				0
Initial Cost of Land				0
Initial Cost of Buildings				3,064,734
Costs Capitalized Subsequent to Acquisition				411,144
Land and Improvements				0
Building and Improvements				3,475,878
Gross Amount Carried at End of Period	$ 3,475,878			3,475,878
Accumulated Depreciation	$ 398,203			398,203
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,475,878
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 398,203
Operating Properties [Member] | 6501 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Fort Lauderdale, FL
Encumbrances				0
Initial Cost of Land				519,984
Initial Cost of Buildings				2,677,465
Costs Capitalized Subsequent to Acquisition				43,251
Land and Improvements				519,984
Building and Improvements				2,720,716
Gross Amount Carried at End of Period	$ 3,240,700			3,240,700
Accumulated Depreciation	$ 247,442			247,442
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,240,700
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 247,442
Operating Properties [Member] | 6600 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Fort Lauderdale, FL
Encumbrances				0
Initial Cost of Land				0
Initial Cost of Buildings				2,988,181
Costs Capitalized Subsequent to Acquisition				274,482
Land and Improvements				0
Building and Improvements				3,262,663
Gross Amount Carried at End of Period	$ 3,262,663			3,262,663
Accumulated Depreciation	$ 386,938			386,938
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,262,663
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 386,938
Operating Properties [Member] | 9601 Cosner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Fredericksburg, VA
Encumbrances				0
Initial Cost of Land				475,262
Initial Cost of Buildings				3,917,234
Costs Capitalized Subsequent to Acquisition				242,595
Land and Improvements				475,262
Building and Improvements				4,159,829
Gross Amount Carried at End of Period	$ 4,635,091			4,635,091
Accumulated Depreciation	$ 2,250,921			2,250,921
Date of Construction or Acquisition	2013
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	$ 2,250,921
Operating Properties [Member] | 5410 - 5430 Northwest 33rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Ft. Lauderdale, FL
Encumbrances				0
Initial Cost of Land				603,776
Initial Cost of Buildings				4,176,238
Costs Capitalized Subsequent to Acquisition				1,976,991
Land and Improvements				625,111
Building and Improvements				6,131,894
Gross Amount Carried at End of Period	$ 6,757,005			6,757,005
Accumulated Depreciation	$ 3,000,812			3,000,812
Date of Construction or Acquisition	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,757,005
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,000,812
Operating Properties [Member] | 12601 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Garden Grove, CA
Encumbrances				0
Initial Cost of Land				2,048,143
Initial Cost of Buildings				1,088,697
Costs Capitalized Subsequent to Acquisition				70,518
Land and Improvements				2,048,143
Building and Improvements				1,159,215
Gross Amount Carried at End of Period	$ 3,207,358			3,207,358
Accumulated Depreciation	$ 223,297			223,297
Date of Construction or Acquisition	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	$ 223,297
Operating Properties [Member] | 12641 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Garden Grove, CA
Encumbrances				0
Initial Cost of Land				3,766,822
Initial Cost of Buildings				2,539,214
Costs Capitalized Subsequent to Acquisition				132,812
Land and Improvements				3,766,822
Building and Improvements				2,672,026
Gross Amount Carried at End of Period	$ 6,438,848			6,438,848
Accumulated Depreciation	$ 315,709			315,709
Date of Construction or Acquisition	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	$ 315,709
Operating Properties [Member] | 12681-12691 Pala Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Garden Grove, CA
Encumbrances				0
Initial Cost of Land				5,221,102
Initial Cost of Buildings				3,225,596
Costs Capitalized Subsequent to Acquisition				83,450
Land and Improvements				5,220,148
Building and Improvements				3,310,000
Gross Amount Carried at End of Period	$ 8,530,148			8,530,148
Accumulated Depreciation	$ 261,465			261,465
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,530,148
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 261,465
Operating Properties [Member] | 850 S Jupiter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Garland, TX
Encumbrances				0
Initial Cost of Land				799,707
Initial Cost of Buildings				6,122,065
Costs Capitalized Subsequent to Acquisition				505,061
Land and Improvements				799,707
Building and Improvements				6,627,126
Gross Amount Carried at End of Period	$ 7,426,833			7,426,833
Accumulated Depreciation	$ 752,290			752,290
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,426,833
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 752,290
Operating Properties [Member] | 2510 W Main Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Grand Prairie, TX
Encumbrances				0
Initial Cost of Land				1,785,741
Initial Cost of Buildings				11,158,818
Costs Capitalized Subsequent to Acquisition				882,172
Land and Improvements				1,785,741
Building and Improvements				12,040,990
Gross Amount Carried at End of Period	$ 13,826,731			13,826,731
Accumulated Depreciation	$ 1,646,773			1,646,773
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,826,731
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,646,773
Operating Properties [Member] | 4251 North Highway 121 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Grapevine, TX
Encumbrances				0
Initial Cost of Land				1,165,780
Initial Cost of Buildings				7,799,270
Costs Capitalized Subsequent to Acquisition				422,213
Land and Improvements				1,165,780
Building and Improvements				8,221,482
Gross Amount Carried at End of Period	$ 9,387,262			9,387,262
Accumulated Depreciation	$ 1,009,876			1,009,876
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,387,262
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,009,876
Operating Properties [Member] | 116 Pleasant Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greensboro, NC
Encumbrances				0
Initial Cost of Land				1,547,811
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				14,208,812
Land and Improvements				3,712,683
Building and Improvements				12,043,940
Gross Amount Carried at End of Period	$ 15,756,623			15,756,623
Accumulated Depreciation	$ 2,616,841			2,616,841
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 15,756,623
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,616,841
Operating Properties [Member] | 25 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greenville, SC
Encumbrances				0
Initial Cost of Land				288,823
Initial Cost of Buildings				3,441,512
Costs Capitalized Subsequent to Acquisition				43,182
Land and Improvements				288,823
Building and Improvements				3,484,694
Gross Amount Carried at End of Period	$ 3,773,517			3,773,517
Accumulated Depreciation	$ 374,491			374,491
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,773,517
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 374,491
Operating Properties [Member] | 45 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greenville, SC
Encumbrances				0
Initial Cost of Land				818,114
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,470,587
Land and Improvements				825,529
Building and Improvements				4,463,172
Gross Amount Carried at End of Period	$ 5,288,701			5,288,701
Accumulated Depreciation	$ 1,144,890			1,144,890
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,288,701
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,144,890
Operating Properties [Member] | 2011 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greenwood, IN
Encumbrances				0
Initial Cost of Land				223,702
Initial Cost of Buildings				3,574,142
Costs Capitalized Subsequent to Acquisition				349,736
Land and Improvements				223,702
Building and Improvements				3,923,878
Gross Amount Carried at End of Period	$ 4,147,580			4,147,580
Accumulated Depreciation	$ 515,529			515,529
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,147,580
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 515,529
Operating Properties [Member] | 2121 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greenwood, IN
Encumbrances				0
Initial Cost of Land				272,823
Initial Cost of Buildings				3,606,920
Costs Capitalized Subsequent to Acquisition				425,965
Land and Improvements				272,823
Building and Improvements				4,032,886
Gross Amount Carried at End of Period	$ 4,305,709			4,305,709
Accumulated Depreciation	$ 674,940			674,940
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,305,709
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 674,940
Operating Properties [Member] | 800 Commerce Parkway West Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greenwood, IN
Encumbrances				0
Initial Cost of Land				1,374,664
Initial Cost of Buildings				29,963,830
Costs Capitalized Subsequent to Acquisition				1,616,774
Land and Improvements				1,374,664
Building and Improvements				31,580,604
Gross Amount Carried at End of Period	$ 32,955,268			32,955,268
Accumulated Depreciation	$ 3,605,585			3,605,585
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 32,955,268
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,605,585
Operating Properties [Member] | 110 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greer, SC
Encumbrances				0
Initial Cost of Land				555,549
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,331,166
Land and Improvements				1,228,880
Building and Improvements				5,657,835
Gross Amount Carried at End of Period	$ 6,886,715			6,886,715
Accumulated Depreciation	$ 325,933			325,933
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,886,715
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 325,933
Operating Properties [Member] | 140 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greer, SC
Encumbrances				0
Initial Cost of Land				1,243,100
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,426,293
Land and Improvements				1,243,100
Building and Improvements				6,426,293
Gross Amount Carried at End of Period	$ 7,669,393			7,669,393
Accumulated Depreciation	$ 395,610			395,610
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,669,393
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 395,610
Operating Properties [Member] | 1487 South Highway 101 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greer, SC
Encumbrances				0
Initial Cost of Land				464,237
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,829,595
Land and Improvements				1,301,738
Building and Improvements				4,992,094
Gross Amount Carried at End of Period	$ 6,293,832			6,293,832
Accumulated Depreciation	$ 1,011,407			1,011,407
Date of Construction or Acquisition	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	$ 1,011,407
Operating Properties [Member] | 2727 London Grove Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Groveport, OH
Encumbrances				0
Initial Cost of Land				1,875,607
Initial Cost of Buildings				11,937,935
Costs Capitalized Subsequent to Acquisition				1,672,294
Land and Improvements				1,875,607
Building and Improvements				13,610,229
Gross Amount Carried at End of Period	$ 15,485,836			15,485,836
Accumulated Depreciation	$ 1,592,762			1,592,762
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 15,485,836
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,592,762
Operating Properties [Member] | 11835 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hagerstown, MD
Encumbrances				0
Initial Cost of Land				14,121,622
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				23,019,069
Land and Improvements				14,121,622
Building and Improvements				23,019,069
Gross Amount Carried at End of Period	$ 37,140,691			37,140,691
Accumulated Depreciation	$ 1,429,004			1,429,004
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 37,140,691
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,429,004
Operating Properties [Member] | 11841 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hagerstown, MD
Encumbrances				0
Initial Cost of Land				3,356,207
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				30,566,609
Land and Improvements				9,741,685
Building and Improvements				24,181,131
Gross Amount Carried at End of Period	$ 33,922,816			33,922,816
Accumulated Depreciation	$ 5,846,534			5,846,534
Date of Construction or Acquisition	2008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 33,922,816
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 5,846,534
Operating Properties [Member] | 1560 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hanover Park, IL
Encumbrances				0
Initial Cost of Land				2,639,734
Initial Cost of Buildings				12,310,741
Costs Capitalized Subsequent to Acquisition				1,125,886
Land and Improvements				2,639,734
Building and Improvements				13,436,627
Gross Amount Carried at End of Period	$ 16,076,361			16,076,361
Accumulated Depreciation	$ 1,418,917			1,418,917
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 16,076,361
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,418,917
Operating Properties [Member] | 1575 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hanover Park, IL
Encumbrances				0
Initial Cost of Land				3,293,284
Initial Cost of Buildings				17,235,926
Costs Capitalized Subsequent to Acquisition				1,159,989
Land and Improvements				3,293,284
Building and Improvements				18,395,915
Gross Amount Carried at End of Period	$ 21,689,199			21,689,199
Accumulated Depreciation	$ 2,021,398			2,021,398
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 21,689,199
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,021,398
Operating Properties [Member] | 7361 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hanover, MD
Encumbrances				0
Initial Cost of Land				2,245,187
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				9,419,956
Land and Improvements				3,822,710
Building and Improvements				7,842,433
Gross Amount Carried at End of Period	$ 11,665,143			11,665,143
Accumulated Depreciation	$ 1,629,408			1,629,408
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,665,143
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,629,408
Operating Properties [Member] | 7460 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hanover, MD
Encumbrances				0
Initial Cost of Land				3,785,446
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,658,893
Land and Improvements				3,796,023
Building and Improvements				7,648,316
Gross Amount Carried at End of Period	$ 11,444,339			11,444,339
Accumulated Depreciation	$ 333,250			333,250
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,444,339
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 333,250
Operating Properties [Member] | 7462 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hanover, MD
Encumbrances				0
Initial Cost of Land				4,059,337
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,481,893
Land and Improvements				4,070,629
Building and Improvements				7,470,601
Gross Amount Carried at End of Period	$ 11,541,230			11,541,230
Accumulated Depreciation	$ 325,162			325,162
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,541,230
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 325,162
Operating Properties [Member] | 500 McCarthy Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Harrisburg, PA
Encumbrances				0
Initial Cost of Land				5,194,872
Initial Cost of Buildings				19,991,436
Costs Capitalized Subsequent to Acquisition				5,018,136
Land and Improvements				5,687,013
Building and Improvements				24,517,431
Gross Amount Carried at End of Period	$ 30,204,444			30,204,444
Accumulated Depreciation	$ 8,376,356			8,376,356
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 30,204,444
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 8,376,356
Operating Properties [Member] | 600 Industrial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Harrisburg, PA
Encumbrances				0
Initial Cost of Land				7,743,800
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				29,159,534
Land and Improvements				9,368,557
Building and Improvements				27,534,777
Gross Amount Carried at End of Period	$ 36,903,334			36,903,334
Accumulated Depreciation	$ 8,663,016			8,663,016
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 36,903,334
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 8,663,016
Operating Properties [Member] | 7195 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Harrisburg, PA
Encumbrances				0
Initial Cost of Land				464,534
Initial Cost of Buildings				6,066,272
Costs Capitalized Subsequent to Acquisition				243,707
Land and Improvements				464,534
Building and Improvements				6,309,979
Gross Amount Carried at End of Period	$ 6,774,513			6,774,513
Accumulated Depreciation	$ 654,034			654,034
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,774,513
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 654,034
Operating Properties [Member] | 7253 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Harrisburg, PA
Encumbrances				0
Initial Cost of Land				954,130
Initial Cost of Buildings				10,585,367
Costs Capitalized Subsequent to Acquisition				547,545
Land and Improvements				954,130
Building and Improvements				11,132,912
Gross Amount Carried at End of Period	$ 12,087,042			12,087,042
Accumulated Depreciation	$ 1,069,407			1,069,407
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,087,042
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,069,407
Operating Properties [Member] | 12537 Cerise Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hawthorne, CA
Encumbrances				0
Initial Cost of Land				2,203,194
Initial Cost of Buildings				5,758,809
Costs Capitalized Subsequent to Acquisition				94,181
Land and Improvements				2,203,194
Building and Improvements				5,852,990
Gross Amount Carried at End of Period	$ 8,056,184			8,056,184
Accumulated Depreciation	$ 649,501			649,501
Date of Construction or Acquisition	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	$ 649,501
Operating Properties [Member] | 1010 Petersburg Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hebron, KY
Encumbrances				0
Initial Cost of Land				305,471
Initial Cost of Buildings				5,434,505
Costs Capitalized Subsequent to Acquisition				(819,916)
Land and Improvements				305,471
Building and Improvements				4,614,589
Gross Amount Carried at End of Period	$ 4,920,060			4,920,060
Accumulated Depreciation	$ 627,848			627,848
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,920,060
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 627,848
Operating Properties [Member] | 785 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hebron, KY
Encumbrances				0
Initial Cost of Land				401,410
Initial Cost of Buildings				3,087,899
Costs Capitalized Subsequent to Acquisition				511,543
Land and Improvements				401,410
Building and Improvements				3,599,442
Gross Amount Carried at End of Period	$ 4,000,852			4,000,852
Accumulated Depreciation	$ 612,450			612,450
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,000,852
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 612,450
Operating Properties [Member] | 805 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hebron, KY
Encumbrances				0
Initial Cost of Land				292,096
Initial Cost of Buildings				2,502,486
Costs Capitalized Subsequent to Acquisition				163,618
Land and Improvements				292,096
Building and Improvements				2,666,103
Gross Amount Carried at End of Period	$ 2,958,199			2,958,199
Accumulated Depreciation	$ 354,922			354,922
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,958,199
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 354,922
Operating Properties [Member] | 825 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hebron, KY
Encumbrances				0
Initial Cost of Land				370,149
Initial Cost of Buildings				3,095,116
Costs Capitalized Subsequent to Acquisition				427,153
Land and Improvements				370,149
Building and Improvements				3,522,270
Gross Amount Carried at End of Period	$ 3,892,419			3,892,419
Accumulated Depreciation	$ 469,314			469,314
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,892,419
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 469,314
Operating Properties [Member] | 845 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hebron, KY
Encumbrances				0
Initial Cost of Land				444,318
Initial Cost of Buildings				3,811,889
Costs Capitalized Subsequent to Acquisition				257,404
Land and Improvements				444,318
Building and Improvements				4,069,293
Gross Amount Carried at End of Period	$ 4,513,611			4,513,611
Accumulated Depreciation	$ 510,796			510,796
Date of Construction or Acquisition	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	$ 510,796
Operating Properties [Member] | 1498 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				94,274
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,174,627
Land and Improvements				791,880
Building and Improvements				5,477,021
Gross Amount Carried at End of Period	$ 6,268,901			6,268,901
Accumulated Depreciation	$ 1,470,238			1,470,238
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,268,901
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,470,238
Operating Properties [Member] | 4183 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				122,203
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,216,383
Land and Improvements				526,266
Building and Improvements				2,812,320
Gross Amount Carried at End of Period	$ 3,338,586			3,338,586
Accumulated Depreciation	$ 1,209,332			1,209,332
Date of Construction or Acquisition	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,338,586
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,209,332
Operating Properties [Member] | 4189 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				100,106
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,610,018
Land and Improvements				431,106
Building and Improvements				3,279,018
Gross Amount Carried at End of Period	$ 3,710,124			3,710,124
Accumulated Depreciation	$ 1,596,673			1,596,673
Date of Construction or Acquisition	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,710,124
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,596,673
Operating Properties [Member] | 4195 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				107,586
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,391,467
Land and Improvements				505,700
Building and Improvements				2,993,353
Gross Amount Carried at End of Period	$ 3,499,053			3,499,053
Accumulated Depreciation	$ 893,968			893,968
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,499,053
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 893,968
Operating Properties [Member] | 4328, 4336 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				539,575
Initial Cost of Land				521,122
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,278,965
Land and Improvements				825,092
Building and Improvements				4,974,995
Gross Amount Carried at End of Period	$ 5,800,087			5,800,087
Accumulated Depreciation	$ 2,396,029			2,396,029
Date of Construction or Acquisition	1995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,800,087
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,396,029
Operating Properties [Member] | 4344 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				484,001
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,113,990
Land and Improvements				173,623
Building and Improvements				3,424,368
Gross Amount Carried at End of Period	$ 3,597,991			3,597,991
Accumulated Depreciation	$ 1,769,967			1,769,967
Date of Construction or Acquisition	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,597,991
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,769,967
Operating Properties [Member] | 4380 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				282,996
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,209,513
Land and Improvements				283,368
Building and Improvements				2,209,141
Gross Amount Carried at End of Period	$ 2,492,509			2,492,509
Accumulated Depreciation	$ 1,125,857			1,125,857
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,492,509
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,125,857
Operating Properties [Member] | 4388 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				143,661
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				1,214,707
Land and Improvements				132,655
Building and Improvements				1,225,713
Gross Amount Carried at End of Period	$ 1,358,368			1,358,368
Accumulated Depreciation	$ 613,784			613,784
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,358,368
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 613,784
Operating Properties [Member] | 4475 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				748,693
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,806,479
Land and Improvements				1,525,421
Building and Improvements				6,029,751
Gross Amount Carried at End of Period	$ 7,555,172			7,555,172
Accumulated Depreciation	$ 1,279,125			1,279,125
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,555,172
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,279,125
Operating Properties [Member] | 4500 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				230,622
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,744,942
Land and Improvements				231,692
Building and Improvements				2,743,872
Gross Amount Carried at End of Period	$ 2,975,564			2,975,564
Accumulated Depreciation	$ 1,509,824			1,509,824
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,975,564
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,509,824
Operating Properties [Member] | 4501 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				319,289
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,110,458
Land and Improvements				320,450
Building and Improvements				3,109,297
Gross Amount Carried at End of Period	$ 3,429,747			3,429,747
Accumulated Depreciation	$ 1,850,162			1,850,162
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,429,747
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,850,162
Operating Properties [Member] | 4523 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				234,564
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,280,376
Land and Improvements				235,698
Building and Improvements				3,279,242
Gross Amount Carried at End of Period	$ 3,514,940			3,514,940
Accumulated Depreciation	$ 2,138,014			2,138,014
Date of Construction or Acquisition	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,514,940
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,138,014
Operating Properties [Member] | 4524 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				182,810
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,815,190
Land and Improvements				183,888
Building and Improvements				2,814,112
Gross Amount Carried at End of Period	$ 2,998,000			2,998,000
Accumulated Depreciation	$ 1,690,876			1,690,876
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,998,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,690,876
Operating Properties [Member] | Unit 5 Logix Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hinckley, UK
Encumbrances				0
Initial Cost of Land				10,547,677
Initial Cost of Buildings				29,691,911
Costs Capitalized Subsequent to Acquisition				(10,236,705)
Land and Improvements				7,864,413
Building and Improvements				22,138,470
Gross Amount Carried at End of Period	$ 30,002,883			30,002,883
Accumulated Depreciation	$ 2,341,916			2,341,916
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 30,002,883
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,341,916
Operating Properties [Member] | 1515 6th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hopkins,MN
Encumbrances				0
Initial Cost of Land				813,036
Initial Cost of Buildings				1,503,075
Costs Capitalized Subsequent to Acquisition				362,817
Land and Improvements				813,036
Building and Improvements				1,865,892
Gross Amount Carried at End of Period	$ 2,678,928			2,678,928
Accumulated Depreciation	$ 384,705			384,705
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,678,928
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 384,705
Operating Properties [Member] | 1600 5th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Hopkins,MN
Encumbrances				0
Initial Cost of Land				339,336
Initial Cost of Buildings				2,106,454
Costs Capitalized Subsequent to Acquisition				80,794
Land and Improvements				339,336
Building and Improvements				2,187,249
Gross Amount Carried at End of Period	$ 2,526,585			2,526,585
Accumulated Depreciation	$ 229,679			229,679
Date of Construction or Acquisition	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	$ 229,679
Operating Properties [Member] | 1000 South Loop West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				509,351
Initial Cost of Buildings				3,549,504
Costs Capitalized Subsequent to Acquisition				871,341
Land and Improvements				509,351
Building and Improvements				4,420,845
Gross Amount Carried at End of Period	$ 4,930,196			4,930,196
Accumulated Depreciation	$ 614,631			614,631
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,930,196
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 614,631
Operating Properties [Member] | 10241 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				558,491
Initial Cost of Buildings				5,740,552
Costs Capitalized Subsequent to Acquisition				133,643
Land and Improvements				558,491
Building and Improvements				5,874,195
Gross Amount Carried at End of Period	$ 6,432,686			6,432,686
Accumulated Depreciation	$ 575,354			575,354
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,432,686
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 575,354
Operating Properties [Member] | 10245 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				426,927
Initial Cost of Buildings				3,460,513
Costs Capitalized Subsequent to Acquisition				379,988
Land and Improvements				426,927
Building and Improvements				3,840,501
Gross Amount Carried at End of Period	$ 4,267,428			4,267,428
Accumulated Depreciation	$ 595,671			595,671
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,267,428
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 595,671
Operating Properties [Member] | 10301 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				545,501
Initial Cost of Buildings				2,927,700
Costs Capitalized Subsequent to Acquisition				1,023,687
Land and Improvements				545,501
Building and Improvements				3,951,386
Gross Amount Carried at End of Period	$ 4,496,887			4,496,887
Accumulated Depreciation	$ 543,738			543,738
Date of Construction or Acquisition	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,496,887
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 543,738
Operating Properties [Member] | 10305 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,340,609
Initial Cost of Buildings				7,489,720
Costs Capitalized Subsequent to Acquisition				2,927,548
Land and Improvements				1,340,609
Building and Improvements				10,417,267
Gross Amount Carried at End of Period	$ 11,757,876			11,757,876
Accumulated Depreciation	$ 1,963,470			1,963,470
Date of Construction or Acquisition	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,757,876
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,963,470
Operating Properties [Member] | 1050 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				973,482
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,627,200
Land and Improvements				992,093
Building and Improvements				3,608,589
Gross Amount Carried at End of Period	$ 4,600,682			4,600,682
Accumulated Depreciation	$ 251,402			251,402
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,600,682
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 251,402
Operating Properties [Member] | 10607 Haddington Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				201,469
Initial Cost of Buildings				1,631,561
Costs Capitalized Subsequent to Acquisition				132,607
Land and Improvements				201,469
Building and Improvements				1,764,169
Gross Amount Carried at End of Period	$ 1,965,638			1,965,638
Accumulated Depreciation	$ 215,692			215,692
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,965,638
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 215,692
Operating Properties [Member] | 10720 West Sam Houston Pkwy N [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				3,871,875
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				28,945,116
Land and Improvements				3,871,875
Building and Improvements				28,945,116
Gross Amount Carried at End of Period	$ 32,816,991			32,816,991
Accumulated Depreciation	$ 737,940			737,940
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 32,816,991
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 737,940
Operating Properties [Member] | 10735 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,110,988
Initial Cost of Buildings				6,351,946
Costs Capitalized Subsequent to Acquisition				3,220,697
Land and Improvements				1,135,483
Building and Improvements				9,548,148
Gross Amount Carried at End of Period	$ 10,683,631			10,683,631
Accumulated Depreciation	$ 3,141,008			3,141,008
Date of Construction or Acquisition	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 10,683,631
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,141,008
Operating Properties [Member] | 10739 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				797,931
Initial Cost of Buildings				5,950,894
Costs Capitalized Subsequent to Acquisition				527,409
Land and Improvements				799,560
Building and Improvements				6,476,674
Gross Amount Carried at End of Period	$ 7,276,234			7,276,234
Accumulated Depreciation	$ 2,438,811			2,438,811
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,276,234
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,438,811
Operating Properties [Member] | 11201 Greens Crossing Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,006,194
Initial Cost of Buildings				5,412,584
Costs Capitalized Subsequent to Acquisition				2,609,554
Land and Improvements				1,008,542
Building and Improvements				8,019,790
Gross Amount Carried at End of Period	$ 9,028,332			9,028,332
Accumulated Depreciation	$ 2,309,645			2,309,645
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,028,332
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,309,645
Operating Properties [Member] | 11220 Ella Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,505,855
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,397,354
Land and Improvements				1,534,644
Building and Improvements				7,368,565
Gross Amount Carried at End of Period	$ 8,903,209			8,903,209
Accumulated Depreciation	$ 348,583			348,583
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,903,209
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 348,583
Operating Properties [Member] | 1283 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				80,730
Initial Cost of Buildings				870,656
Costs Capitalized Subsequent to Acquisition				145,476
Land and Improvements				80,730
Building and Improvements				1,016,132
Gross Amount Carried at End of Period	$ 1,096,862			1,096,862
Accumulated Depreciation	$ 135,165			135,165
Date of Construction or Acquisition	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	$ 135,165
Operating Properties [Member] | 1287 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				146,654
Initial Cost of Buildings				1,620,780
Costs Capitalized Subsequent to Acquisition				59,710
Land and Improvements				146,654
Building and Improvements				1,680,489
Gross Amount Carried at End of Period	$ 1,827,143			1,827,143
Accumulated Depreciation	$ 236,879			236,879
Date of Construction or Acquisition	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	$ 236,879
Operating Properties [Member] | 1291 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				510,102
Initial Cost of Buildings				4,129,042
Costs Capitalized Subsequent to Acquisition				561,970
Land and Improvements				510,102
Building and Improvements				4,691,012
Gross Amount Carried at End of Period	$ 5,201,114			5,201,114
Accumulated Depreciation	$ 579,918			579,918
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,201,114
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 579,918
Operating Properties [Member] | 1416 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				218,850
Initial Cost of Buildings				1,639,902
Costs Capitalized Subsequent to Acquisition				556,292
Land and Improvements				218,850
Building and Improvements				2,196,193
Gross Amount Carried at End of Period	$ 2,415,043			2,415,043
Accumulated Depreciation	$ 301,676			301,676
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,415,043
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 301,676
Operating Properties [Member] | 1420 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				211,279
Initial Cost of Buildings				1,554,156
Costs Capitalized Subsequent to Acquisition				116,306
Land and Improvements				211,279
Building and Improvements				1,670,462
Gross Amount Carried at End of Period	$ 1,881,741			1,881,741
Accumulated Depreciation	$ 208,672			208,672
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,881,741
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 208,672
Operating Properties [Member] | 14200 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,396,794
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,859,739
Land and Improvements				1,699,632
Building and Improvements				4,556,901
Gross Amount Carried at End of Period	$ 6,256,533			6,256,533
Accumulated Depreciation	$ 531,845			531,845
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,256,533
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 531,845
Operating Properties [Member] | 1424 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				283,107
Initial Cost of Buildings				2,077,323
Costs Capitalized Subsequent to Acquisition				416,964
Land and Improvements				283,107
Building and Improvements				2,494,287
Gross Amount Carried at End of Period	$ 2,777,394			2,777,394
Accumulated Depreciation	$ 291,827			291,827
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,777,394
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 291,827
Operating Properties [Member] | 1428 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				367,446
Initial Cost of Buildings				1,952,453
Costs Capitalized Subsequent to Acquisition				183,185
Land and Improvements				367,446
Building and Improvements				2,135,637
Gross Amount Carried at End of Period	$ 2,503,083			2,503,083
Accumulated Depreciation	$ 259,350			259,350
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,503,083
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 259,350
Operating Properties [Member] | 14300 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,377,193
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,679,691
Land and Improvements				1,405,899
Building and Improvements				5,650,985
Gross Amount Carried at End of Period	$ 7,056,884			7,056,884
Accumulated Depreciation	$ 503,260			503,260
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,056,884
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 503,260
Operating Properties [Member] | 14400 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,830,419
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,239,740
Land and Improvements				1,861,540
Building and Improvements				7,208,619
Gross Amount Carried at End of Period	$ 9,070,159			9,070,159
Accumulated Depreciation	$ 1,322,096			1,322,096
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,070,159
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,322,096
Operating Properties [Member] | 15102 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				755,121
Initial Cost of Buildings				3,155,774
Costs Capitalized Subsequent to Acquisition				247,397
Land and Improvements				755,121
Building and Improvements				3,403,171
Gross Amount Carried at End of Period	$ 4,158,292			4,158,292
Accumulated Depreciation	$ 446,988			446,988
Date of Construction or Acquisition	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	$ 446,988
Operating Properties [Member] | 15150 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				418,580
Initial Cost of Buildings				1,564,587
Costs Capitalized Subsequent to Acquisition				230,574
Land and Improvements				418,580
Building and Improvements				1,795,161
Gross Amount Carried at End of Period	$ 2,213,741			2,213,741
Accumulated Depreciation	$ 245,069			245,069
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,213,741
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 245,069
Operating Properties [Member] | 16330 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,540,109
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				8,528,507
Land and Improvements				1,966,472
Building and Improvements				8,102,144
Gross Amount Carried at End of Period	$ 10,068,616			10,068,616
Accumulated Depreciation	$ 617,774			617,774
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 10,068,616
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 617,774
Operating Properties [Member] | 16405 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				438,853
Initial Cost of Buildings				3,030,396
Costs Capitalized Subsequent to Acquisition				552,188
Land and Improvements				438,853
Building and Improvements				3,582,584
Gross Amount Carried at End of Period	$ 4,021,437			4,021,437
Accumulated Depreciation	$ 1,828,930			1,828,930
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,021,437
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,828,930
Operating Properties [Member] | 16420 West Hardy Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				529,876
Initial Cost of Buildings				3,267,872
Costs Capitalized Subsequent to Acquisition				405,158
Land and Improvements				529,876
Building and Improvements				3,673,030
Gross Amount Carried at End of Period	$ 4,202,906			4,202,906
Accumulated Depreciation	$ 425,317			425,317
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,202,906
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 425,317
Operating Properties [Member] | 16445 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				363,339
Initial Cost of Buildings				2,509,186
Costs Capitalized Subsequent to Acquisition				364,183
Land and Improvements				363,339
Building and Improvements				2,873,369
Gross Amount Carried at End of Period	$ 3,236,708			3,236,708
Accumulated Depreciation	$ 1,339,476			1,339,476
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,236,708
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,339,476
Operating Properties [Member] | 1646 Rankin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				329,961
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,128,210
Land and Improvements				592,234
Building and Improvements				4,865,937
Gross Amount Carried at End of Period	$ 5,458,171			5,458,171
Accumulated Depreciation	$ 1,424,604			1,424,604
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,458,171
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,424,604
Operating Properties [Member] | 1655 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				197,226
Initial Cost of Buildings				935,036
Costs Capitalized Subsequent to Acquisition				528,658
Land and Improvements				197,226
Building and Improvements				1,463,694
Gross Amount Carried at End of Period	$ 1,660,920			1,660,920
Accumulated Depreciation	$ 240,071			240,071
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,660,920
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 240,071
Operating Properties [Member] | 16580 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				289,000
Initial Cost of Buildings				3,559,857
Costs Capitalized Subsequent to Acquisition				1,285,142
Land and Improvements				289,000
Building and Improvements				4,845,000
Gross Amount Carried at End of Period	$ 5,134,000			5,134,000
Accumulated Depreciation	$ 1,956,500			1,956,500
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,134,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,956,500
Operating Properties [Member] | 16602 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				284,403
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,461,695
Land and Improvements				503,779
Building and Improvements				5,242,319
Gross Amount Carried at End of Period	$ 5,746,098			5,746,098
Accumulated Depreciation	$ 1,435,142			1,435,142
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,746,098
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,435,142
Operating Properties [Member] | 16605 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				298,999
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,423,751
Land and Improvements				496,186
Building and Improvements				3,226,564
Gross Amount Carried at End of Period	$ 3,722,750			3,722,750
Accumulated Depreciation	$ 1,190,212			1,190,212
Date of Construction or Acquisition	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,722,750
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,190,212
Operating Properties [Member] | 1665 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				452,439
Initial Cost of Buildings				2,016,585
Costs Capitalized Subsequent to Acquisition				535,863
Land and Improvements				452,439
Building and Improvements				2,552,447
Gross Amount Carried at End of Period	$ 3,004,886			3,004,886
Accumulated Depreciation	$ 217,319			217,319
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,004,886
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 217,319
Operating Properties [Member] | 16680 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				311,952
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,714,116
Land and Improvements				492,869
Building and Improvements				3,533,199
Gross Amount Carried at End of Period	$ 4,026,068			4,026,068
Accumulated Depreciation	$ 769,315			769,315
Date of Construction or Acquisition	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,026,068
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 769,315
Operating Properties [Member] | 16685 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				414,691
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,455,222
Land and Improvements				414,691
Building and Improvements				2,455,222
Gross Amount Carried at End of Period	$ 2,869,913			2,869,913
Accumulated Depreciation	$ 758,065			758,065
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,869,913
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 758,065
Operating Properties [Member] | 1755 Trans Central Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				293,534
Initial Cost of Buildings				3,036,269
Costs Capitalized Subsequent to Acquisition				1,336,826
Land and Improvements				306,147
Building and Improvements				4,360,482
Gross Amount Carried at End of Period	$ 4,666,629			4,666,629
Accumulated Depreciation	$ 1,505,006			1,505,006
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,666,629
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,505,006
Operating Properties [Member] | 4301 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				226,973
Initial Cost of Buildings				1,174,979
Costs Capitalized Subsequent to Acquisition				142,562
Land and Improvements				226,973
Building and Improvements				1,317,541
Gross Amount Carried at End of Period	$ 1,544,514			1,544,514
Accumulated Depreciation	$ 196,184			196,184
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,544,514
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 196,184
Operating Properties [Member] | 4401 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				244,240
Initial Cost of Buildings				1,412,622
Costs Capitalized Subsequent to Acquisition				97,515
Land and Improvements				244,240
Building and Improvements				1,510,137
Gross Amount Carried at End of Period	$ 1,754,377			1,754,377
Accumulated Depreciation	$ 247,437			247,437
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,754,377
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 247,437
Operating Properties [Member] | 4501 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				252,907
Initial Cost of Buildings				1,504,053
Costs Capitalized Subsequent to Acquisition				68,292
Land and Improvements				252,907
Building and Improvements				1,572,345
Gross Amount Carried at End of Period	$ 1,825,252			1,825,252
Accumulated Depreciation	$ 203,559			203,559
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,825,252
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 203,559
Operating Properties [Member] | 5200 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,519,458
Initial Cost of Buildings				7,135,548
Costs Capitalized Subsequent to Acquisition				3,703,478
Land and Improvements				1,520,074
Building and Improvements				10,838,410
Gross Amount Carried at End of Period	$ 12,358,484			12,358,484
Accumulated Depreciation	$ 3,288,143			3,288,143
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,358,484
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,288,143
Operating Properties [Member] | 5250 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				2,173,287
Initial Cost of Buildings				8,868,256
Costs Capitalized Subsequent to Acquisition				2,296,346
Land and Improvements				2,173,942
Building and Improvements				11,163,947
Gross Amount Carried at End of Period	$ 13,337,889			13,337,889
Accumulated Depreciation	$ 2,648,783			2,648,783
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,337,889
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,648,783
Operating Properties [Member] | 5500 N. Sam Houston Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,243,541
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,456,833
Land and Improvements				1,513,152
Building and Improvements				6,187,222
Gross Amount Carried at End of Period	$ 7,700,374			7,700,374
Accumulated Depreciation	$ 1,121,080			1,121,080
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,700,374
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,121,080
Operating Properties [Member] | 8017 Pinemont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				900,953
Initial Cost of Buildings				5,323,727
Costs Capitalized Subsequent to Acquisition				475,338
Land and Improvements				900,953
Building and Improvements				5,799,065
Gross Amount Carried at End of Period	$ 6,700,018			6,700,018
Accumulated Depreciation	$ 588,757			588,757
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,700,018
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 588,757
Operating Properties [Member] | 8272 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				530,494
Initial Cost of Buildings				4,108,626
Costs Capitalized Subsequent to Acquisition				302,577
Land and Improvements				530,494
Building and Improvements				4,411,203
Gross Amount Carried at End of Period	$ 4,941,697			4,941,697
Accumulated Depreciation	$ 509,990			509,990
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,941,697
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 509,990
Operating Properties [Member] | 8282 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				450,422
Initial Cost of Buildings				3,304,942
Costs Capitalized Subsequent to Acquisition				1,076,398
Land and Improvements				450,422
Building and Improvements				4,381,340
Gross Amount Carried at End of Period	$ 4,831,762			4,831,762
Accumulated Depreciation	$ 559,879			559,879
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,831,762
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 559,879
Operating Properties [Member] | 8301 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				4,515,862
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				26,930,936
Land and Improvements				7,083,514
Building and Improvements				24,363,284
Gross Amount Carried at End of Period	$ 31,446,798			31,446,798
Accumulated Depreciation	$ 5,575,785			5,575,785
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 31,446,798
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 5,575,785
Operating Properties [Member] | 8303 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				4,613,370
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				16,411,802
Land and Improvements				4,858,863
Building and Improvements				16,166,309
Gross Amount Carried at End of Period	$ 21,025,172			21,025,172
Accumulated Depreciation	$ 556,508			556,508
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 21,025,172
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 556,508
Operating Properties [Member] | 850 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				2,893,405
Initial Cost of Buildings				11,593,197
Costs Capitalized Subsequent to Acquisition				2,914,238
Land and Improvements				2,899,861
Building and Improvements				14,500,978
Gross Amount Carried at End of Period	$ 17,400,839			17,400,839
Accumulated Depreciation	$ 3,371,778			3,371,778
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 17,400,839
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,371,778
Operating Properties [Member] | 860 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,399,365
Initial Cost of Buildings				6,344,650
Costs Capitalized Subsequent to Acquisition				1,583,440
Land and Improvements				1,374,012
Building and Improvements				7,953,443
Gross Amount Carried at End of Period	$ 9,327,455			9,327,455
Accumulated Depreciation	$ 1,899,501			1,899,501
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,327,455
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,899,501
Operating Properties [Member] | 8801-19 & 8821-49 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				2,290,001
Initial Cost of Buildings				15,297,141
Costs Capitalized Subsequent to Acquisition				3,207,265
Land and Improvements				2,290,002
Building and Improvements				18,504,405
Gross Amount Carried at End of Period	$ 20,794,407			20,794,407
Accumulated Depreciation	$ 6,151,203			6,151,203
Date of Construction or Acquisition	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 20,794,407
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 6,151,203
Operating Properties [Member] | 8802-8824 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				2,774,995
Initial Cost of Buildings				6,364,767
Costs Capitalized Subsequent to Acquisition				1,373,297
Land and Improvements				2,775,021
Building and Improvements				7,738,037
Gross Amount Carried at End of Period	$ 10,513,058			10,513,058
Accumulated Depreciation	$ 2,800,334			2,800,334
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 10,513,058
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,800,334
Operating Properties [Member] | 8825-8839 N Sam Houston Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				638,453
Initial Cost of Buildings				3,258,815
Costs Capitalized Subsequent to Acquisition				759,249
Land and Improvements				638,477
Building and Improvements				4,018,039
Gross Amount Carried at End of Period	$ 4,656,516			4,656,516
Accumulated Depreciation	$ 1,273,899			1,273,899
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,656,516
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,273,899
Operating Properties [Member] | 8850-8872 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				504,317
Initial Cost of Buildings				2,878,351
Costs Capitalized Subsequent to Acquisition				1,342,043
Land and Improvements				504,341
Building and Improvements				4,220,370
Gross Amount Carried at End of Period	$ 4,724,711			4,724,711
Accumulated Depreciation	$ 1,565,437			1,565,437
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,724,711
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,565,437
Operating Properties [Member] | Liberty 11 at Central Green [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				1,748,348
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				9,341,500
Land and Improvements				2,120,319
Building and Improvements				8,969,529
Gross Amount Carried at End of Period	$ 11,089,848			11,089,848
Accumulated Depreciation	$ 1,152,770			1,152,770
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,089,848
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,152,770
Operating Properties [Member] | Cabot III UK1B01 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Isle of Man, UK
Encumbrances				0
Initial Cost of Land				11,888,058
Initial Cost of Buildings				35,003,668
Costs Capitalized Subsequent to Acquisition				(12,081,249)
Land and Improvements				8,863,808
Building and Improvements				25,946,669
Gross Amount Carried at End of Period	$ 34,810,477			34,810,477
Accumulated Depreciation	$ 2,411,261			2,411,261
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 34,810,477
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,411,261
Operating Properties [Member] | 1011 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Itasca, IL
Encumbrances				0
Initial Cost of Land				842,043
Initial Cost of Buildings				984,087
Costs Capitalized Subsequent to Acquisition				205,986
Land and Improvements				842,043
Building and Improvements				1,190,073
Gross Amount Carried at End of Period	$ 2,032,116			2,032,116
Accumulated Depreciation	$ 139,492			139,492
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,032,116
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 139,492
Operating Properties [Member] | 1035 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Itasca, IL
Encumbrances				0
Initial Cost of Land				875,172
Initial Cost of Buildings				2,071,051
Costs Capitalized Subsequent to Acquisition				124,976
Land and Improvements				875,172
Building and Improvements				2,196,028
Gross Amount Carried at End of Period	$ 3,071,200			3,071,200
Accumulated Depreciation	$ 211,605			211,605
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,071,200
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 211,605
Operating Properties [Member] | 1549 W Glenlake Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Itasca, IL
Encumbrances				0
Initial Cost of Land				1,339,627
Initial Cost of Buildings				3,763,288
Costs Capitalized Subsequent to Acquisition				192,040
Land and Improvements				1,339,627
Building and Improvements				3,955,327
Gross Amount Carried at End of Period	$ 5,294,954			5,294,954
Accumulated Depreciation	$ 427,368			427,368
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,294,954
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 427,368
Operating Properties [Member] | 901 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Itasca, IL
Encumbrances				0
Initial Cost of Land				866,378
Initial Cost of Buildings				2,112,616
Costs Capitalized Subsequent to Acquisition				47,808
Land and Improvements				866,378
Building and Improvements				2,160,424
Gross Amount Carried at End of Period	$ 3,026,802			3,026,802
Accumulated Depreciation	$ 210,501			210,501
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,026,802
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 210,501
Operating Properties [Member] | 925 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Itasca, IL
Encumbrances				0
Initial Cost of Land				945,251
Initial Cost of Buildings				2,010,181
Costs Capitalized Subsequent to Acquisition				47,379
Land and Improvements				945,251
Building and Improvements				2,057,560
Gross Amount Carried at End of Period	$ 3,002,811			3,002,811
Accumulated Depreciation	$ 197,257			197,257
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,002,811
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 197,257
Operating Properties [Member] | 8241 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Jessup, MD
Encumbrances				0
Initial Cost of Land				1,246,618
Initial Cost of Buildings				6,844,393
Costs Capitalized Subsequent to Acquisition				1,103,659
Land and Improvements				1,246,618
Building and Improvements				7,948,051
Gross Amount Carried at End of Period	$ 9,194,669			9,194,669
Accumulated Depreciation	$ 805,705			805,705
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,194,669
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 805,705
Operating Properties [Member] | 8242 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Jessup, MD
Encumbrances				0
Initial Cost of Land				1,488,746
Initial Cost of Buildings				9,072,440
Costs Capitalized Subsequent to Acquisition				1,493,323
Land and Improvements				1,488,746
Building and Improvements				10,565,763
Gross Amount Carried at End of Period	$ 12,054,509			12,054,509
Accumulated Depreciation	$ 1,161,811			1,161,811
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,054,509
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,161,811
Operating Properties [Member] | 8246 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Jessup, MD
Encumbrances				0
Initial Cost of Land				590,922
Initial Cost of Buildings				3,374,522
Costs Capitalized Subsequent to Acquisition				111,015
Land and Improvements				590,922
Building and Improvements				3,485,537
Gross Amount Carried at End of Period	$ 4,076,459			4,076,459
Accumulated Depreciation	$ 345,762			345,762
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,076,459
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 345,762
Operating Properties [Member] | 1305 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Kennesaw, GA
Encumbrances				0
Initial Cost of Land				808,159
Initial Cost of Buildings				5,712,959
Costs Capitalized Subsequent to Acquisition				1,051,081
Land and Improvements				808,159
Building and Improvements				6,764,040
Gross Amount Carried at End of Period	$ 7,572,199			7,572,199
Accumulated Depreciation	$ 883,996			883,996
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,572,199
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 883,996
Operating Properties [Member] | 1325 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Kennesaw, GA
Encumbrances				0
Initial Cost of Land				1,612,924
Initial Cost of Buildings				9,771,680
Costs Capitalized Subsequent to Acquisition				1,534,221
Land and Improvements				1,612,924
Building and Improvements				11,305,901
Gross Amount Carried at End of Period	$ 12,918,825			12,918,825
Accumulated Depreciation	$ 1,682,142			1,682,142
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,918,825
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,682,142
Operating Properties [Member] | 3600 Cobb International Bld NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Kennesaw, GA
Encumbrances				0
Initial Cost of Land				716,860
Initial Cost of Buildings				6,962,212
Costs Capitalized Subsequent to Acquisition				588,950
Land and Improvements				716,860
Building and Improvements				7,551,163
Gross Amount Carried at End of Period	$ 8,268,023			8,268,023
Accumulated Depreciation	$ 948,932			948,932
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,268,023
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 948,932
Operating Properties [Member] | Unit 1 Bear Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Kettering, UK
Encumbrances				0
Initial Cost of Land				10,849,890
Initial Cost of Buildings				36,219,855
Costs Capitalized Subsequent to Acquisition				(11,974,257)
Land and Improvements				8,089,744
Building and Improvements				27,005,744
Gross Amount Carried at End of Period	$ 35,095,488			35,095,488
Accumulated Depreciation	$ 2,695,056			2,695,056
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 35,095,488
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,695,056
Operating Properties [Member] | 2100 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				1,110,111
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				12,306,079
Land and Improvements				1,132,519
Building and Improvements				12,283,671
Gross Amount Carried at End of Period	$ 13,416,190			13,416,190
Accumulated Depreciation	$ 5,489,796			5,489,796
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,416,190
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 5,489,796
Operating Properties [Member] | 2201 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				2,370,895
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				15,302,266
Land and Improvements				2,413,514
Building and Improvements				15,259,647
Gross Amount Carried at End of Period	$ 17,673,161			17,673,161
Accumulated Depreciation	$ 7,225,129			7,225,129
Date of Construction or Acquisition	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 17,673,161
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 7,225,129
Operating Properties [Member] | 2300 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				509,580
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,743,070
Land and Improvements				574,152
Building and Improvements				3,678,498
Gross Amount Carried at End of Period	$ 4,252,650			4,252,650
Accumulated Depreciation	$ 1,713,751			1,713,751
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,252,650
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,713,751
Operating Properties [Member] | 2301 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				1,645,246
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				30,461,859
Land and Improvements				4,581,649
Building and Improvements				27,525,456
Gross Amount Carried at End of Period	$ 32,107,105			32,107,105
Accumulated Depreciation	$ 12,142,198			12,142,198
Date of Construction or Acquisition	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 32,107,105
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 12,142,198
Operating Properties [Member] | 2500 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				509,580
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,012,278
Land and Improvements				592,886
Building and Improvements				2,928,972
Gross Amount Carried at End of Period	$ 3,521,858			3,521,858
Accumulated Depreciation	$ 1,416,276			1,416,276
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,521,858
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,416,276
Operating Properties [Member] | 2520 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				1,020,000
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,293,427
Land and Improvements				978,402
Building and Improvements				5,335,025
Gross Amount Carried at End of Period	$ 6,313,427			6,313,427
Accumulated Depreciation	$ 1,766,387			1,766,387
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,313,427
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,766,387
Operating Properties [Member] | 2560 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				607,210
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,352,052
Land and Improvements				649,792
Building and Improvements				3,309,470
Gross Amount Carried at End of Period	$ 3,959,262			3,959,262
Accumulated Depreciation	$ 1,138,866			1,138,866
Date of Construction or Acquisition	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,959,262
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,138,866
Operating Properties [Member] | 2700 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				764,370
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,489,386
Land and Improvements				867,815
Building and Improvements				3,385,941
Gross Amount Carried at End of Period	$ 4,253,756			4,253,756
Accumulated Depreciation	$ 1,431,193			1,431,193
Date of Construction or Acquisition	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,253,756
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,431,193
Operating Properties [Member] | 2900 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				679,440
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,516,054
Land and Improvements				774,096
Building and Improvements				3,421,398
Gross Amount Carried at End of Period	$ 4,195,494			4,195,494
Accumulated Depreciation	$ 1,756,501			1,756,501
Date of Construction or Acquisition	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,195,494
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,756,501
Operating Properties [Member] | 3000 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				1,191,449
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,476,299
Land and Improvements				946,703
Building and Improvements				2,721,045
Gross Amount Carried at End of Period	$ 3,667,748			3,667,748
Accumulated Depreciation	$ 1,258,265			1,258,265
Date of Construction or Acquisition	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	$ 1,258,265
Operating Properties [Member] | 3100 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				601,956
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,455,727
Land and Improvements				611,436
Building and Improvements				2,446,247
Gross Amount Carried at End of Period	$ 3,057,683			3,057,683
Accumulated Depreciation	$ 1,042,209			1,042,209
Date of Construction or Acquisition	1995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,057,683
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,042,209
Operating Properties [Member] | 3200 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				928,637
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,471,488
Land and Improvements				1,210,137
Building and Improvements				7,189,988
Gross Amount Carried at End of Period	$ 8,400,125			8,400,125
Accumulated Depreciation	$ 3,257,868			3,257,868
Date of Construction or Acquisition	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,400,125
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,257,868
Operating Properties [Member] | 3400 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				776,496
Initial Cost of Buildings				3,139,068
Costs Capitalized Subsequent to Acquisition				1,724,321
Land and Improvements				776,496
Building and Improvements				4,863,388
Gross Amount Carried at End of Period	$ 5,639,884			5,639,884
Accumulated Depreciation	$ 2,299,839			2,299,839
Date of Construction or Acquisition	1995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,639,884
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,299,839
Operating Properties [Member] | 3500 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				1,204,839
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,850,802
Land and Improvements				1,223,875
Building and Improvements				2,831,766
Gross Amount Carried at End of Period	$ 4,055,641			4,055,641
Accumulated Depreciation	$ 1,429,538			1,429,538
Date of Construction or Acquisition	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,055,641
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,429,538
Operating Properties [Member] | 3600 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				236,432
Initial Cost of Buildings				1,856,252
Costs Capitalized Subsequent to Acquisition				820,461
Land and Improvements				236,432
Building and Improvements				2,676,713
Gross Amount Carried at End of Period	$ 2,913,145			2,913,145
Accumulated Depreciation	$ 1,331,021			1,331,021
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,913,145
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,331,021
Operating Properties [Member] | 3602 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				217,734
Initial Cost of Buildings				1,759,489
Costs Capitalized Subsequent to Acquisition				420,954
Land and Improvements				217,809
Building and Improvements				2,180,368
Gross Amount Carried at End of Period	$ 2,398,177			2,398,177
Accumulated Depreciation	$ 1,151,155			1,151,155
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,398,177
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,151,155
Operating Properties [Member] | 3604 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				397,178
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				1,880,505
Land and Improvements				350,874
Building and Improvements				1,926,809
Gross Amount Carried at End of Period	$ 2,277,683			2,277,683
Accumulated Depreciation	$ 1,096,483			1,096,483
Date of Construction or Acquisition	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,277,683
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,096,483
Operating Properties [Member] | 440 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				717,001
Initial Cost of Buildings				4,816,121
Costs Capitalized Subsequent to Acquisition				2,862,287
Land and Improvements				717,001
Building and Improvements				7,678,408
Gross Amount Carried at End of Period	$ 8,395,409			8,395,409
Accumulated Depreciation	$ 4,371,634			4,371,634
Date of Construction or Acquisition	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,395,409
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 4,371,634
Operating Properties [Member] | 460 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				705,317
Initial Cost of Buildings				4,737,487
Costs Capitalized Subsequent to Acquisition				4,307,707
Land and Improvements				705,317
Building and Improvements				9,045,194
Gross Amount Carried at End of Period	$ 9,750,511			9,750,511
Accumulated Depreciation	$ 4,454,376			4,454,376
Date of Construction or Acquisition	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,750,511
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 4,454,376
Operating Properties [Member] | 650 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				952,911
Initial Cost of Buildings				6,722,830
Costs Capitalized Subsequent to Acquisition				8,131,184
Land and Improvements				952,911
Building and Improvements				14,854,014
Gross Amount Carried at End of Period	$ 15,806,925			15,806,925
Accumulated Depreciation	$ 7,931,558			7,931,558
Date of Construction or Acquisition	1971
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 15,806,925
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 7,931,558
Operating Properties [Member] | 680 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	King of Prussia, PA
Encumbrances				0
Initial Cost of Land				952,361
Initial Cost of Buildings				6,722,830
Costs Capitalized Subsequent to Acquisition				7,217,277
Land and Improvements				952,361
Building and Improvements				13,940,107
Gross Amount Carried at End of Period	$ 14,892,468			14,892,468
Accumulated Depreciation	$ 7,457,506			7,457,506
Date of Construction or Acquisition	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	$ 7,457,506
Operating Properties [Member] | 1700 Interstate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Lakeland, FL
Encumbrances				0
Initial Cost of Land				650,000
Initial Cost of Buildings				5,444,220
Costs Capitalized Subsequent to Acquisition				0
Land and Improvements				650,000
Building and Improvements				5,444,220
Gross Amount Carried at End of Period	$ 6,094,220			6,094,220
Accumulated Depreciation	$ 608,401			608,401
Date of Construction or Acquisition	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	$ 608,401
Operating Properties [Member] | 5801 Columbia Park Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Landover,MD
Encumbrances				0
Initial Cost of Land				1,187,620
Initial Cost of Buildings				4,598,346
Costs Capitalized Subsequent to Acquisition				182,789
Land and Improvements				1,187,620
Building and Improvements				4,781,135
Gross Amount Carried at End of Period	$ 5,968,755			5,968,755
Accumulated Depreciation	$ 4,781,135			4,781,135
Date of Construction or Acquisition	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	$ 4,781,135
Operating Properties [Member] | 11425 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	LaPorte, TX
Encumbrances				0
Initial Cost of Land				975,974
Initial Cost of Buildings				3,409,036
Costs Capitalized Subsequent to Acquisition				100,699
Land and Improvements				977,542
Building and Improvements				3,508,166
Gross Amount Carried at End of Period	$ 4,485,708			4,485,708
Accumulated Depreciation	$ 996,075			996,075
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,485,708
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 996,075
Operating Properties [Member] | 11503 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	LaPorte, TX
Encumbrances				0
Initial Cost of Land				2,561,931
Initial Cost of Buildings				9,695,493
Costs Capitalized Subsequent to Acquisition				272,748
Land and Improvements				2,566,047
Building and Improvements				9,964,125
Gross Amount Carried at End of Period	$ 12,530,172			12,530,172
Accumulated Depreciation	$ 2,686,659			2,686,659
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,530,172
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,686,659
Operating Properties [Member] | 1701 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	LaPorte, TX
Encumbrances				0
Initial Cost of Land				4,063,262
Initial Cost of Buildings				18,719,368
Costs Capitalized Subsequent to Acquisition				132,035
Land and Improvements				4,063,262
Building and Improvements				18,851,403
Gross Amount Carried at End of Period	$ 22,914,665			22,914,665
Accumulated Depreciation	$ 764,225			764,225
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 22,914,665
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 764,225
Operating Properties [Member] | 1842 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	LaPorte, TX
Encumbrances				0
Initial Cost of Land				2,226,284
Initial Cost of Buildings				11,976,185
Costs Capitalized Subsequent to Acquisition				19,270
Land and Improvements				2,226,284
Building and Improvements				11,995,454
Gross Amount Carried at End of Period	$ 14,221,738			14,221,738
Accumulated Depreciation	$ 513,070			513,070
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 14,221,738
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 513,070
Operating Properties [Member] | 1902 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	LaPorte, TX
Encumbrances				0
Initial Cost of Land				2,369,095
Initial Cost of Buildings				14,119,020
Costs Capitalized Subsequent to Acquisition				0
Land and Improvements				2,369,095
Building and Improvements				14,119,020
Gross Amount Carried at End of Period	$ 16,488,115			16,488,115
Accumulated Depreciation	$ 636,966			636,966
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 16,488,115
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 636,966
Operating Properties [Member] | 640 S State Road 39 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Lebanon,IN
Encumbrances				0
Initial Cost of Land				1,612,787
Initial Cost of Buildings				18,065,552
Costs Capitalized Subsequent to Acquisition				1,215,412
Land and Improvements				1,612,787
Building and Improvements				19,280,964
Gross Amount Carried at End of Period	$ 20,893,751			20,893,751
Accumulated Depreciation	$ 2,283,155			2,283,155
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 20,893,751
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,283,155
Operating Properties [Member] | 7528 Walker Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Lehigh, PA
Encumbrances				0
Initial Cost of Land				893,441
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,643,010
Land and Improvements				779,330
Building and Improvements				5,757,121
Gross Amount Carried at End of Period	$ 6,536,451			6,536,451
Accumulated Depreciation	$ 2,144,171			2,144,171
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,536,451
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,144,171
Operating Properties [Member] | 8301 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Lehigh, PA
Encumbrances				0
Initial Cost of Land				11,249,550
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				48,850,004
Land and Improvements				11,254,716
Building and Improvements				48,844,838
Gross Amount Carried at End of Period	$ 60,099,554			60,099,554
Accumulated Depreciation	$ 12,795,718			12,795,718
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 60,099,554
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 12,795,718
Operating Properties [Member] | 8500 Willard Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Lehigh, PA
Encumbrances				663,153
Initial Cost of Land				6,398,815
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				33,734,013
Land and Improvements				11,355,974
Building and Improvements				28,776,854
Gross Amount Carried at End of Period	$ 40,132,828			40,132,828
Accumulated Depreciation	$ 5,185,360			5,185,360
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 40,132,828
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 5,185,360
Operating Properties [Member] | 875 Maxham Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Lithia Springs, GA
Encumbrances				0
Initial Cost of Land				445,493
Initial Cost of Buildings				10,160,616
Costs Capitalized Subsequent to Acquisition				560,063
Land and Improvements				445,493
Building and Improvements				10,720,679
Gross Amount Carried at End of Period	$ 11,166,172			11,166,172
Accumulated Depreciation	$ 1,183,900			1,183,900
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,166,172
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,183,900
Operating Properties [Member] | 8742 Congdon Hill Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Lower Macungie, PA
Encumbrances				0
Initial Cost of Land				22,444,500
Initial Cost of Buildings				20,222,582
Costs Capitalized Subsequent to Acquisition				0
Land and Improvements				22,444,500
Building and Improvements				20,222,582
Gross Amount Carried at End of Period	$ 42,667,082			42,667,082
Accumulated Depreciation	$ 118,225			118,225
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 42,667,082
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 118,225
Operating Properties [Member] | 7533 Industrial Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Lower Macungie, PA
Encumbrances				0
Initial Cost of Land				5,603,460
Initial Cost of Buildings				18,807,987
Costs Capitalized Subsequent to Acquisition				2,632,563
Land and Improvements				5,603,460
Building and Improvements				21,440,550
Gross Amount Carried at End of Period	$ 27,044,010			27,044,010
Accumulated Depreciation	$ 3,905,673			3,905,673
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 27,044,010
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,905,673
Operating Properties [Member] | 10 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				823,540
Initial Cost of Buildings				1,341,376
Costs Capitalized Subsequent to Acquisition				247,936
Land and Improvements				832,244
Building and Improvements				1,580,608
Gross Amount Carried at End of Period	$ 2,412,852			2,412,852
Accumulated Depreciation	$ 1,112,039			1,112,039
Date of Construction or Acquisition	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,412,852
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,112,039
Operating Properties [Member] | 10 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances				0
Initial Cost of Land				509,075
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,699,241
Land and Improvements				509,899
Building and Improvements				2,698,417
Gross Amount Carried at End of Period	3,208,316			3,208,316
Accumulated Depreciation	$ 1,997,432			1,997,432
Date of Construction or Acquisition	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	$ 1,997,432
Operating Properties [Member] | 10, 20 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				724,058
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,405,657
Land and Improvements				724,846
Building and Improvements				5,404,869
Gross Amount Carried at End of Period	$ 6,129,715			6,129,715
Accumulated Depreciation	$ 3,502,879			3,502,879
Date of Construction or Acquisition	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,129,715
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,502,879
Operating Properties [Member] | 100 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				1,320,625
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,509,345
Land and Improvements				1,977,935
Building and Improvements				6,852,035
Gross Amount Carried at End of Period	$ 8,829,970			8,829,970
Accumulated Depreciation	$ 3,796,493			3,796,493
Date of Construction or Acquisition	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	$ 3,796,493
Operating Properties [Member] | 1001 Cedar Hollow Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				1,436,814
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				16,828,215
Land and Improvements				1,676,470
Building and Improvements				16,588,559
Gross Amount Carried at End of Period	$ 18,265,029			18,265,029
Accumulated Depreciation	$ 8,745,481			8,745,481
Date of Construction or Acquisition	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 18,265,029
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 8,745,481
Operating Properties [Member] | 11 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				496,297
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				1,931,329
Land and Improvements				708,331
Building and Improvements				1,719,295
Gross Amount Carried at End of Period	$ 2,427,626			2,427,626
Accumulated Depreciation	$ 1,719,295			1,719,295
Date of Construction or Acquisition	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,427,626
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,719,295
Operating Properties [Member] | 11,15 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				1,837,050
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				14,958,472
Land and Improvements				1,837,878
Building and Improvements				14,957,644
Gross Amount Carried at End of Period	$ 16,795,522			16,795,522
Accumulated Depreciation	$ 14,957,645			14,957,645
Date of Construction or Acquisition	1986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 16,795,522
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 14,957,645
Operating Properties [Member] | 12,14,16 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				130,689
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				1,329,148
Land and Improvements				128,767
Building and Improvements				1,331,070
Gross Amount Carried at End of Period	$ 1,459,837			1,459,837
Accumulated Depreciation	$ 1,110,861			1,110,861
Date of Construction or Acquisition	1982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,459,837
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,110,861
Operating Properties [Member] | 14 Lee Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				664,282
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,906,244
Land and Improvements				643,892
Building and Improvements				5,926,634
Gross Amount Carried at End of Period	$ 6,570,526			6,570,526
Accumulated Depreciation	$ 4,101,766			4,101,766
Date of Construction or Acquisition	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,570,526
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 4,101,766
Operating Properties [Member] | 18 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				394,036
Initial Cost of Buildings				3,976,221
Costs Capitalized Subsequent to Acquisition				(1,229,407)
Land and Improvements				397,293
Building and Improvements				2,743,557
Gross Amount Carried at End of Period	$ 3,140,850			3,140,850
Accumulated Depreciation	$ 2,743,556			2,743,556
Date of Construction or Acquisition	1980
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,140,850
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,743,556
Operating Properties [Member] | 200 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				495,893
Initial Cost of Buildings				2,739,093
Costs Capitalized Subsequent to Acquisition				698,060
Land and Improvements				812,745
Building and Improvements				3,120,301
Gross Amount Carried at End of Period	$ 3,933,046			3,933,046
Accumulated Depreciation	$ 2,640,096			2,640,096
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,933,046
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,640,096
Operating Properties [Member] | 300-400 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				937,212
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,220,320
Land and Improvements				1,402,795
Building and Improvements				5,754,737
Gross Amount Carried at End of Period	$ 7,157,532			7,157,532
Accumulated Depreciation	$ 3,342,758			3,342,758
Date of Construction or Acquisition	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,157,532
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,342,758
Operating Properties [Member] | 311 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				397,131
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,710,506
Land and Improvements				397,948
Building and Improvements				2,709,689
Gross Amount Carried at End of Period	$ 3,107,637			3,107,637
Accumulated Depreciation	$ 2,301,566			2,301,566
Date of Construction or Acquisition	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	$ 2,301,566
Operating Properties [Member] | 425 Old Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				3,847,501
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				45,859,328
Land and Improvements				9,953,208
Building and Improvements				39,753,621
Gross Amount Carried at End of Period	$ 49,706,829			49,706,829
Accumulated Depreciation	$ 2,565,627			2,565,627
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 49,706,829
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,565,627
Operating Properties [Member] | 45 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				4,380,221
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				15,329,271
Land and Improvements				4,749,748
Building and Improvements				14,959,744
Gross Amount Carried at End of Period	$ 19,709,492			19,709,492
Accumulated Depreciation	$ 8,158,914			8,158,914
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 19,709,492
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 8,158,914
Operating Properties [Member] | 50 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				849,576
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				14,101,863
Land and Improvements				1,337,076
Building and Improvements				13,614,363
Gross Amount Carried at End of Period	$ 14,951,439			14,951,439
Accumulated Depreciation	$ 7,454,051			7,454,051
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 14,951,439
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 7,454,051
Operating Properties [Member] | 500 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				472,364
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,162,401
Land and Improvements				762,370
Building and Improvements				2,872,395
Gross Amount Carried at End of Period	$ 3,634,765			3,634,765
Accumulated Depreciation	$ 1,895,859			1,895,859
Date of Construction or Acquisition	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	$ 1,895,859
Operating Properties [Member] | 60 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				865,424
Initial Cost of Buildings				9,285,000
Costs Capitalized Subsequent to Acquisition				5,598,450
Land and Improvements				884,974
Building and Improvements				14,863,900
Gross Amount Carried at End of Period	$ 15,748,874			15,748,874
Accumulated Depreciation	$ 9,949,361			9,949,361
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 15,748,874
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 9,949,361
Operating Properties [Member] | 600 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				2,013,750
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				9,413,146
Land and Improvements				2,798,565
Building and Improvements				8,628,331
Gross Amount Carried at End of Period	$ 11,426,896			11,426,896
Accumulated Depreciation	$ 4,510,096			4,510,096
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,426,896
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 4,510,096
Operating Properties [Member] | 700 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				2,013,750
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				9,251,414
Land and Improvements				2,785,823
Building and Improvements				8,479,341
Gross Amount Carried at End of Period	$ 11,265,164			11,265,164
Accumulated Depreciation	$ 4,447,650			4,447,650
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,265,164
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 4,447,650
Operating Properties [Member] | 1169 Canton Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Marietta, GA
Encumbrances				0
Initial Cost of Land				1,232,219
Initial Cost of Buildings				17,897,326
Costs Capitalized Subsequent to Acquisition				437,586
Land and Improvements				1,232,219
Building and Improvements				18,334,912
Gross Amount Carried at End of Period	$ 19,567,131			19,567,131
Accumulated Depreciation	$ 1,835,793			1,835,793
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 19,567,131
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,835,793
Operating Properties [Member] | 65 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Mauldin, SC
Encumbrances				0
Initial Cost of Land				557,174
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,856,370
Land and Improvements				506,318
Building and Improvements				2,907,226
Gross Amount Carried at End of Period	$ 3,413,544			3,413,544
Accumulated Depreciation	$ 922,607			922,607
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,413,544
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 922,607
Operating Properties [Member] | 75 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Mauldin, SC
Encumbrances				0
Initial Cost of Land				419,731
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,349,647
Land and Improvements				430,909
Building and Improvements				2,338,469
Gross Amount Carried at End of Period	$ 2,769,378			2,769,378
Accumulated Depreciation	$ 751,363			751,363
Date of Construction or Acquisition	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,769,378
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 751,363
Operating Properties [Member] | 126-132 Liberty Industrial Pkw [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	McDonough, GA
Encumbrances				0
Initial Cost of Land				600,666
Initial Cost of Buildings				4,184,131
Costs Capitalized Subsequent to Acquisition				573,223
Land and Improvements				600,666
Building and Improvements				4,757,353
Gross Amount Carried at End of Period	$ 5,358,019			5,358,019
Accumulated Depreciation	$ 788,235			788,235
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,358,019
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 788,235
Operating Properties [Member] | 95-115 Liberty Industrial Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	McDonough, GA
Encumbrances				0
Initial Cost of Land				660,420
Initial Cost of Buildings				4,785,127
Costs Capitalized Subsequent to Acquisition				661,518
Land and Improvements				660,420
Building and Improvements				5,446,645
Gross Amount Carried at End of Period	$ 6,107,065			6,107,065
Accumulated Depreciation	$ 829,134			829,134
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,107,065
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 829,134
Operating Properties [Member] | 11150 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Medley, FL
Encumbrances				0
Initial Cost of Land				6,627,899
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				12,281,367
Land and Improvements				6,627,899
Building and Improvements				12,281,367
Gross Amount Carried at End of Period	$ 18,909,266			18,909,266
Accumulated Depreciation	$ 331,588			331,588
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 18,909,266
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 331,588
Operating Properties [Member] | 11401 NW 134th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Medley, FL
Encumbrances				0
Initial Cost of Land				5,558,619
Initial Cost of Buildings				17,678,237
Costs Capitalized Subsequent to Acquisition				1,118,286
Land and Improvements				5,558,619
Building and Improvements				18,796,523
Gross Amount Carried at End of Period	$ 24,355,142			24,355,142
Accumulated Depreciation	$ 2,237,448			2,237,448
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 24,355,142
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,237,448
Operating Properties [Member] | 11450 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Medley, FL
Encumbrances				0
Initial Cost of Land				1,623,293
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				11,424,316
Land and Improvements				3,919,238
Building and Improvements				9,128,371
Gross Amount Carried at End of Period	$ 13,047,609			13,047,609
Accumulated Depreciation	$ 461,030			461,030
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,047,609
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 461,030
Operating Properties [Member] | 456 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Minooka, IL
Encumbrances				0
Initial Cost of Land				3,862,683
Initial Cost of Buildings				14,357,981
Costs Capitalized Subsequent to Acquisition				4,591,711
Land and Improvements				3,862,683
Building and Improvements				18,949,692
Gross Amount Carried at End of Period	$ 22,812,375			22,812,375
Accumulated Depreciation	$ 2,034,996			2,034,996
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 22,812,375
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,034,996
Operating Properties [Member] | 21 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Monroe Township, NJ
Encumbrances				0
Initial Cost of Land				2,097,170
Initial Cost of Buildings				9,715,401
Costs Capitalized Subsequent to Acquisition				561,745
Land and Improvements				2,097,170
Building and Improvements				10,277,146
Gross Amount Carried at End of Period	$ 12,374,316			12,374,316
Accumulated Depreciation	$ 1,305,675			1,305,675
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,374,316
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,305,675
Operating Properties [Member] | 4 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Monroe Township, NJ
Encumbrances				0
Initial Cost of Land				2,263,153
Initial Cost of Buildings				10,261,759
Costs Capitalized Subsequent to Acquisition				599,026
Land and Improvements				2,263,153
Building and Improvements				10,860,785
Gross Amount Carried at End of Period	$ 13,123,938			13,123,938
Accumulated Depreciation	$ 1,251,816			1,251,816
Date of Construction or Acquisition	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	$ 1,251,816
Operating Properties [Member] | 22750 Cactus Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Moreno Valley, CA
Encumbrances				0
Initial Cost of Land				9,404,283
Initial Cost of Buildings				24,380,934
Costs Capitalized Subsequent to Acquisition				1,851,865
Land and Improvements				9,408,276
Building and Improvements				26,228,806
Gross Amount Carried at End of Period	$ 35,637,082			35,637,082
Accumulated Depreciation	$ 1,802,722			1,802,722
Date of Construction or Acquisition	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	$ 1,802,722
Operating Properties [Member] | 323 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Morrisville, NC
Encumbrances				0
Initial Cost of Land				1,071,600
Initial Cost of Buildings				4,397,807
Costs Capitalized Subsequent to Acquisition				1,029,987
Land and Improvements				1,071,600
Building and Improvements				5,427,794
Gross Amount Carried at End of Period	$ 6,499,394			6,499,394
Accumulated Depreciation	$ 1,341,393			1,341,393
Date of Construction or Acquisition	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,499,394
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,341,393
Operating Properties [Member] | 324 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Morrisville, NC
Encumbrances				0
Initial Cost of Land				1,449,092
Initial Cost of Buildings				4,424,932
Costs Capitalized Subsequent to Acquisition				330,260
Land and Improvements				1,449,450
Building and Improvements				4,754,834
Gross Amount Carried at End of Period	$ 6,204,284			6,204,284
Accumulated Depreciation	$ 1,267,257			1,267,257
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,204,284
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,267,257
Operating Properties [Member] | 619 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Morrisville, NC
Encumbrances				0
Initial Cost of Land				1,031,430
Initial Cost of Buildings				5,655,167
Costs Capitalized Subsequent to Acquisition				769,286
Land and Improvements				1,031,685
Building and Improvements				6,424,198
Gross Amount Carried at End of Period	$ 7,455,883			7,455,883
Accumulated Depreciation	$ 1,571,097			1,571,097
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,455,883
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,571,097
Operating Properties [Member] | 701 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Morrisville, NC
Encumbrances				0
Initial Cost of Land				1,300,889
Initial Cost of Buildings				5,313,226
Costs Capitalized Subsequent to Acquisition				223,184
Land and Improvements				1,301,211
Building and Improvements				5,536,088
Gross Amount Carried at End of Period	$ 6,837,299			6,837,299
Accumulated Depreciation	$ 1,402,290			1,402,290
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,837,299
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,402,290
Operating Properties [Member] | 1879 Lamont Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Odenton, MD
Encumbrances				0
Initial Cost of Land				1,976,000
Initial Cost of Buildings				8,099,579
Costs Capitalized Subsequent to Acquisition				2,067,689
Land and Improvements				2,011,030
Building and Improvements				10,132,238
Gross Amount Carried at End of Period	$ 12,143,268			12,143,268
Accumulated Depreciation	$ 3,242,952			3,242,952
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,143,268
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,242,952
Operating Properties [Member] | 350 Winmeyer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Odenton, MD
Encumbrances				0
Initial Cost of Land				1,778,400
Initial Cost of Buildings				7,289,165
Costs Capitalized Subsequent to Acquisition				2,081,514
Land and Improvements				1,809,927
Building and Improvements				9,339,152
Gross Amount Carried at End of Period	$ 11,149,079			11,149,079
Accumulated Depreciation	$ 3,023,879			3,023,879
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,149,079
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,023,879
Operating Properties [Member] | 4000 E Airport Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Ontario, CA
Encumbrances				0
Initial Cost of Land				2,686,533
Initial Cost of Buildings				10,125,772
Costs Capitalized Subsequent to Acquisition				560,320
Land and Improvements				2,686,533
Building and Improvements				10,686,092
Gross Amount Carried at End of Period	$ 13,372,625			13,372,625
Accumulated Depreciation	$ 1,134,941			1,134,941
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,372,625
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,134,941
Operating Properties [Member] | 1000 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				415,906
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,826,589
Land and Improvements				435,400
Building and Improvements				2,807,095
Gross Amount Carried at End of Period	$ 3,242,495			3,242,495
Accumulated Depreciation	$ 716,623			716,623
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,242,495
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 716,623
Operating Properties [Member] | 10003 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				680,312
Initial Cost of Buildings				2,120,754
Costs Capitalized Subsequent to Acquisition				1,406,213
Land and Improvements				680,312
Building and Improvements				3,526,967
Gross Amount Carried at End of Period	$ 4,207,279			4,207,279
Accumulated Depreciation	$ 1,418,449			1,418,449
Date of Construction or Acquisition	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,207,279
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,418,449
Operating Properties [Member] | 10511 & 10611 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				517,554
Initial Cost of Buildings				2,568,186
Costs Capitalized Subsequent to Acquisition				699,185
Land and Improvements				522,991
Building and Improvements				3,261,934
Gross Amount Carried at End of Period	$ 3,784,925			3,784,925
Accumulated Depreciation	$ 1,605,946			1,605,946
Date of Construction or Acquisition	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,784,925
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,605,946
Operating Properties [Member] | 10771 Palm Bay Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				664,605
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,515,652
Land and Improvements				685,383
Building and Improvements				2,494,874
Gross Amount Carried at End of Period	$ 3,180,257			3,180,257
Accumulated Depreciation	$ 902,836			902,836
Date of Construction or Acquisition	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,180,257
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 902,836
Operating Properties [Member] | 1090 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				878,320
Initial Cost of Buildings				2,558,833
Costs Capitalized Subsequent to Acquisition				3,100,835
Land and Improvements				878,320
Building and Improvements				5,659,668
Gross Amount Carried at End of Period	$ 6,537,988			6,537,988
Accumulated Depreciation	$ 1,344,968			1,344,968
Date of Construction or Acquisition	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,537,988
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,344,968
Operating Properties [Member] | 1400-1440 Central Florida Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				518,043
Initial Cost of Buildings				2,561,938
Costs Capitalized Subsequent to Acquisition				966,144
Land and Improvements				518,043
Building and Improvements				3,528,082
Gross Amount Carried at End of Period	$ 4,046,125			4,046,125
Accumulated Depreciation	$ 1,767,649			1,767,649
Date of Construction or Acquisition	1962
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,046,125
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,767,649
Operating Properties [Member] | 1902 Cypress Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				523,512
Initial Cost of Buildings				3,191,790
Costs Capitalized Subsequent to Acquisition				1,522,627
Land and Improvements				538,512
Building and Improvements				4,699,417
Gross Amount Carried at End of Period	$ 5,237,929			5,237,929
Accumulated Depreciation	$ 2,237,527			2,237,527
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,237,929
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,237,527
Operating Properties [Member] | 2000 Park Oaks Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				913,201
Initial Cost of Buildings				6,818,610
Costs Capitalized Subsequent to Acquisition				993,299
Land and Improvements				913,201
Building and Improvements				7,811,909
Gross Amount Carried at End of Period	$ 8,725,110			8,725,110
Accumulated Depreciation	$ 872,681			872,681
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,725,110
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 872,681
Operating Properties [Member] | 2202 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				1,283,713
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,315,061
Land and Improvements				1,283,713
Building and Improvements				7,315,061
Gross Amount Carried at End of Period	$ 8,598,774			8,598,774
Accumulated Depreciation	$ 2,932,282			2,932,282
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,598,774
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,932,282
Operating Properties [Member] | 2212 Taft Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				838,853
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,084,540
Land and Improvements				767,953
Building and Improvements				4,155,440
Gross Amount Carried at End of Period	$ 4,923,393			4,923,393
Accumulated Depreciation	$ 1,295,463			1,295,463
Date of Construction or Acquisition	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	$ 1,295,463
Operating Properties [Member] | 2256 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				467,296
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,856,683
Land and Improvements				825,673
Building and Improvements				2,498,306
Gross Amount Carried at End of Period	$ 3,323,979			3,323,979
Accumulated Depreciation	$ 868,515			868,515
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,323,979
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 868,515
Operating Properties [Member] | 2351 Investors Row [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				2,261,924
Initial Cost of Buildings				7,496,249
Costs Capitalized Subsequent to Acquisition				2,669,413
Land and Improvements				2,271,785
Building and Improvements				10,155,801
Gross Amount Carried at End of Period	$ 12,427,586			12,427,586
Accumulated Depreciation	$ 3,524,750			3,524,750
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,427,586
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,524,750
Operating Properties [Member] | 2400 South Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				385,964
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,218,244
Land and Improvements				642,427
Building and Improvements				2,961,781
Gross Amount Carried at End of Period	$ 3,604,208			3,604,208
Accumulated Depreciation	$ 1,311,061			1,311,061
Date of Construction or Acquisition	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,604,208
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,311,061
Operating Properties [Member] | 2412 Sand Lake Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				1,236,819
Initial Cost of Buildings				3,243,314
Costs Capitalized Subsequent to Acquisition				4,515,655
Land and Improvements				1,244,667
Building and Improvements				7,751,121
Gross Amount Carried at End of Period	$ 8,995,788			8,995,788
Accumulated Depreciation	$ 807,848			807,848
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,995,788
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 807,848
Operating Properties [Member] | 2416 Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				535,964
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,830,045
Land and Improvements				704,800
Building and Improvements				3,661,209
Gross Amount Carried at End of Period	$ 4,366,009			4,366,009
Accumulated Depreciation	$ 1,588,980			1,588,980
Date of Construction or Acquisition	2002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,366,009
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,588,980
Operating Properties [Member] | 6200 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				1,435,301
Initial Cost of Buildings				6,174,642
Costs Capitalized Subsequent to Acquisition				635,186
Land and Improvements				1,435,301
Building and Improvements				6,809,828
Gross Amount Carried at End of Period	$ 8,245,129			8,245,129
Accumulated Depreciation	$ 1,975,783			1,975,783
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,245,129
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,975,783
Operating Properties [Member] | 6501 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				903,701
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,673,010
Land and Improvements				925,671
Building and Improvements				5,651,040
Gross Amount Carried at End of Period	$ 6,576,711			6,576,711
Accumulated Depreciation	$ 2,176,452			2,176,452
Date of Construction or Acquisition	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,576,711
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,176,452
Operating Properties [Member] | 6918 Presidents Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				872,550
Initial Cost of Buildings				2,526,043
Costs Capitalized Subsequent to Acquisition				627,577
Land and Improvements				872,550
Building and Improvements				3,153,620
Gross Amount Carried at End of Period	$ 4,026,170			4,026,170
Accumulated Depreciation	$ 299,246			299,246
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,026,170
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 299,246
Operating Properties [Member] | 6923 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				903,701
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,792,659
Land and Improvements				830,953
Building and Improvements				3,865,407
Gross Amount Carried at End of Period	$ 4,696,360			4,696,360
Accumulated Depreciation	$ 1,262,732			1,262,732
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,696,360
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,262,732
Operating Properties [Member] | 7022 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				1,443,510
Initial Cost of Buildings				6,775,194
Costs Capitalized Subsequent to Acquisition				585,783
Land and Improvements				1,457,286
Building and Improvements				7,347,202
Gross Amount Carried at End of Period	$ 8,804,488			8,804,488
Accumulated Depreciation	$ 1,922,035			1,922,035
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,804,488
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,922,035
Operating Properties [Member] | 7100 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				1,431,489
Initial Cost of Buildings				8,002,539
Costs Capitalized Subsequent to Acquisition				799,248
Land and Improvements				1,445,807
Building and Improvements				8,787,469
Gross Amount Carried at End of Period	$ 10,233,276			10,233,276
Accumulated Depreciation	$ 2,397,957			2,397,957
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 10,233,276
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,397,957
Operating Properties [Member] | 7101 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				1,553,537
Initial Cost of Buildings				5,702,243
Costs Capitalized Subsequent to Acquisition				591,287
Land and Improvements				1,570,863
Building and Improvements				6,276,204
Gross Amount Carried at End of Period	$ 7,847,067			7,847,067
Accumulated Depreciation	$ 1,599,823			1,599,823
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,847,067
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,599,823
Operating Properties [Member] | 7315 Kingspointe Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				1,931,697
Initial Cost of Buildings				6,388,203
Costs Capitalized Subsequent to Acquisition				2,903,691
Land and Improvements				1,932,004
Building and Improvements				9,291,587
Gross Amount Carried at End of Period	$ 11,223,591			11,223,591
Accumulated Depreciation	$ 3,677,424			3,677,424
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,223,591
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,677,424
Operating Properties [Member] | 851 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				332,992
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,819,927
Land and Improvements				373,500
Building and Improvements				2,779,419
Gross Amount Carried at End of Period	$ 3,152,919			3,152,919
Accumulated Depreciation	$ 678,992			678,992
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,152,919
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 678,992
Operating Properties [Member] | 950 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				443,989
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,909,996
Land and Improvements				464,800
Building and Improvements				2,889,185
Gross Amount Carried at End of Period	$ 3,353,985			3,353,985
Accumulated Depreciation	$ 689,162			689,162
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,353,985
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 689,162
Operating Properties [Member] | 29 Liberty Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Malling, UK
Encumbrances				0
Initial Cost of Land				165,363
Initial Cost of Buildings				1,139,928
Costs Capitalized Subsequent to Acquisition				(89,307)
Land and Improvements				154,313
Building and Improvements				1,061,670
Gross Amount Carried at End of Period	$ 1,215,983			1,215,983
Accumulated Depreciation	$ 13,602			13,602
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,215,983
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 13,602
Operating Properties [Member] | 9550 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				574,831
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,682,249
Land and Improvements				587,319
Building and Improvements				2,669,761
Gross Amount Carried at End of Period	$ 3,257,080			3,257,080
Accumulated Depreciation	$ 1,315,038			1,315,038
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,257,080
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,315,038
Operating Properties [Member] | 9600 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				252,850
Initial Cost of Buildings				1,297,923
Costs Capitalized Subsequent to Acquisition				185,097
Land and Improvements				252,850
Building and Improvements				1,483,020
Gross Amount Carried at End of Period	$ 1,735,870			1,735,870
Accumulated Depreciation	$ 682,906			682,906
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,735,870
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 682,906
Operating Properties [Member] | 9700 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				405,362
Initial Cost of Buildings				1,146,546
Costs Capitalized Subsequent to Acquisition				417,433
Land and Improvements				405,362
Building and Improvements				1,563,979
Gross Amount Carried at End of Period	$ 1,969,341			1,969,341
Accumulated Depreciation	$ 722,863			722,863
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,969,341
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 722,863
Operating Properties [Member] | 1 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				567,280
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				14,836,673
Land and Improvements				347,892
Building and Improvements				15,056,061
Gross Amount Carried at End of Period	$ 15,403,953			15,403,953
Accumulated Depreciation	$ 4,124,088			4,124,088
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 15,403,953
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 4,124,088
Operating Properties [Member] | 150 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				567,531
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				14,040,200
Land and Improvements				569,349
Building and Improvements				14,038,382
Gross Amount Carried at End of Period	$ 14,607,731			14,607,731
Accumulated Depreciation	$ 1,779,160			1,779,160
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 14,607,731
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,779,160
Operating Properties [Member] | 201 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				243,905
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				22,534,911
Land and Improvements				449,013
Building and Improvements				22,329,803
Gross Amount Carried at End of Period	$ 22,778,816			22,778,816
Accumulated Depreciation	$ 1,353,759			1,353,759
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 22,778,816
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,353,759
Operating Properties [Member] | 3 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				214,726
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				22,605,215
Land and Improvements				417,823
Building and Improvements				22,402,118
Gross Amount Carried at End of Period	$ 22,819,941			22,819,941
Accumulated Depreciation	$ 4,108,488			4,108,488
Date of Construction or Acquisition	2008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 22,819,941
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 4,108,488
Operating Properties [Member] | 4000 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				1,255,507
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				10,816,115
Land and Improvements				1,142,358
Building and Improvements				10,929,264
Gross Amount Carried at End of Period	$ 12,071,622			12,071,622
Accumulated Depreciation	$ 407,471			407,471
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,071,622
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 407,471
Operating Properties [Member] | 4020 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				51,784
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,165,151
Land and Improvements				616,467
Building and Improvements				6,600,468
Gross Amount Carried at End of Period	$ 7,216,935			7,216,935
Accumulated Depreciation	$ 836,575			836,575
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,216,935
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 836,575
Operating Properties [Member] | 4050 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				46,301
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,163,875
Land and Improvements				616,670
Building and Improvements				6,593,506
Gross Amount Carried at End of Period	$ 7,210,176			7,210,176
Accumulated Depreciation	$ 1,030,380			1,030,380
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,210,176
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,030,380
Operating Properties [Member] | 4300 South 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				402,673
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				34,854,173
Land and Improvements				413,030
Building and Improvements				34,843,816
Gross Amount Carried at End of Period	$ 35,256,846			35,256,846
Accumulated Depreciation	$ 6,615,001			6,615,001
Date of Construction or Acquisition	2008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 35,256,846
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 6,615,001
Operating Properties [Member] | 4751 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				992,965
Initial Cost of Buildings				331,924
Costs Capitalized Subsequent to Acquisition				7,806,820
Land and Improvements				613,248
Building and Improvements				8,518,461
Gross Amount Carried at End of Period	$ 9,131,709			9,131,709
Accumulated Depreciation	$ 2,930,840			2,930,840
Date of Construction or Acquisition	2003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,131,709
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,930,840
Operating Properties [Member] | 4775 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				891,892
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,578,804
Land and Improvements				366,982
Building and Improvements				6,103,714
Gross Amount Carried at End of Period	$ 6,470,696			6,470,696
Accumulated Depreciation	$ 1,468,939			1,468,939
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,470,696
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,468,939
Operating Properties [Member] | 5 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				1,765,341
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				75,231,724
Land and Improvements				1,897,303
Building and Improvements				75,099,762
Gross Amount Carried at End of Period	$ 76,997,065			76,997,065
Accumulated Depreciation	$ 8,129,695			8,129,695
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 76,997,065
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 8,129,695
Operating Properties [Member] | 8th & Walnut Streets [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				40,061,756
Initial Cost of Land				734,275
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				45,366,959
Land and Improvements				0
Building and Improvements				46,101,234
Gross Amount Carried at End of Period	$ 46,101,234			46,101,234
Accumulated Depreciation	$ 3,468,952			3,468,952
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 46,101,234
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,468,952
Operating Properties [Member] | 2626 South 7th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Phoenix, AZ
Encumbrances				0
Initial Cost of Land				2,519,510
Initial Cost of Buildings				3,798,560
Costs Capitalized Subsequent to Acquisition				3,444,729
Land and Improvements				2,519,510
Building and Improvements				7,243,289
Gross Amount Carried at End of Period	$ 9,762,799			9,762,799
Accumulated Depreciation	$ 1,365,742			1,365,742
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,762,799
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,365,742
Operating Properties [Member] | 563 South 63rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Phoenix, AZ
Encumbrances				0
Initial Cost of Land				5,523,427
Initial Cost of Buildings				14,581,705
Costs Capitalized Subsequent to Acquisition				12,199,604
Land and Improvements				5,636,070
Building and Improvements				26,668,666
Gross Amount Carried at End of Period	$ 32,304,736			32,304,736
Accumulated Depreciation	$ 2,283,003			2,283,003
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 32,304,736
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,283,003
Operating Properties [Member] | 1000 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Plano, TX
Encumbrances				0
Initial Cost of Land				706,660
Initial Cost of Buildings				5,894,330
Costs Capitalized Subsequent to Acquisition				258,628
Land and Improvements				706,660
Building and Improvements				6,152,959
Gross Amount Carried at End of Period	$ 6,859,619			6,859,619
Accumulated Depreciation	$ 679,107			679,107
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,859,619
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 679,107
Operating Properties [Member] | 1901 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Plano, TX
Encumbrances				0
Initial Cost of Land				555,168
Initial Cost of Buildings				6,401,789
Costs Capitalized Subsequent to Acquisition				482,432
Land and Improvements				555,168
Building and Improvements				6,884,221
Gross Amount Carried at End of Period	$ 7,439,389			7,439,389
Accumulated Depreciation	$ 816,759			816,759
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,439,389
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 816,759
Operating Properties [Member] | 1909 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Plano, TX
Encumbrances				0
Initial Cost of Land				551,706
Initial Cost of Buildings				5,797,440
Costs Capitalized Subsequent to Acquisition				259,807
Land and Improvements				551,706
Building and Improvements				6,057,247
Gross Amount Carried at End of Period	$ 6,608,953			6,608,953
Accumulated Depreciation	$ 673,886			673,886
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,608,953
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 673,886
Operating Properties [Member] | 3605 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Plano, TX
Encumbrances				0
Initial Cost of Land				1,047,996
Initial Cost of Buildings				9,218,748
Costs Capitalized Subsequent to Acquisition				1,970,078
Land and Improvements				1,047,996
Building and Improvements				11,188,825
Gross Amount Carried at End of Period	$ 12,236,821			12,236,821
Accumulated Depreciation	$ 1,304,882			1,304,882
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,236,821
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,304,882
Operating Properties [Member] | 3701 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Plano, TX
Encumbrances				0
Initial Cost of Land				877,564
Initial Cost of Buildings				7,460,686
Costs Capitalized Subsequent to Acquisition				788,731
Land and Improvements				877,564
Building and Improvements				8,249,416
Gross Amount Carried at End of Period	$ 9,126,980			9,126,980
Accumulated Depreciation	$ 855,019			855,019
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,126,980
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 855,019
Operating Properties [Member] | 800 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Plano, TX
Encumbrances				0
Initial Cost of Land				580,456
Initial Cost of Buildings				5,681,283
Costs Capitalized Subsequent to Acquisition				271,634
Land and Improvements				580,456
Building and Improvements				5,952,917
Gross Amount Carried at End of Period	$ 6,533,373			6,533,373
Accumulated Depreciation	$ 648,375			648,375
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,533,373
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 648,375
Operating Properties [Member] | 900 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Plano, TX
Encumbrances				0
Initial Cost of Land				723,534
Initial Cost of Buildings				6,004,923
Costs Capitalized Subsequent to Acquisition				352,138
Land and Improvements				723,534
Building and Improvements				6,357,061
Gross Amount Carried at End of Period	$ 7,080,595			7,080,595
Accumulated Depreciation	$ 755,534			755,534
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,080,595
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 755,534
Operating Properties [Member] | 9801 80th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pleasant Prairie, WI
Encumbrances				0
Initial Cost of Land				1,692,077
Initial Cost of Buildings				7,934,794
Costs Capitalized Subsequent to Acquisition				58,274
Land and Improvements				1,689,726
Building and Improvements				7,995,419
Gross Amount Carried at End of Period	$ 9,685,145			9,685,145
Accumulated Depreciation	$ 3,607,080			3,607,080
Date of Construction or Acquisition	1994
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,685,145
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,607,080
Operating Properties [Member] | 14630-14650 28th Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Plymouth, MN
Encumbrances				0
Initial Cost of Land				198,205
Initial Cost of Buildings				1,793,422
Costs Capitalized Subsequent to Acquisition				1,096,872
Land and Improvements				198,205
Building and Improvements				2,890,293
Gross Amount Carried at End of Period	$ 3,088,498			3,088,498
Accumulated Depreciation	$ 1,386,033			1,386,033
Date of Construction or Acquisition	1978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,088,498
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,386,033
Operating Properties [Member] | 2920 Northwest Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Plymouth, MN
Encumbrances				0
Initial Cost of Land				392,026
Initial Cost of Buildings				3,433,678
Costs Capitalized Subsequent to Acquisition				702,745
Land and Improvements				384,235
Building and Improvements				4,144,214
Gross Amount Carried at End of Period	$ 4,528,449			4,528,449
Accumulated Depreciation	$ 1,929,556			1,929,556
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,528,449
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,929,556
Operating Properties [Member] | 5905 Trenton Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Plymouth, MN
Encumbrances				0
Initial Cost of Land				1,616,360
Initial Cost of Buildings				4,487,462
Costs Capitalized Subsequent to Acquisition				735,223
Land and Improvements				1,616,360
Building and Improvements				5,222,684
Gross Amount Carried at End of Period	$ 6,839,044			6,839,044
Accumulated Depreciation	$ 651,727			651,727
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,839,044
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 651,727
Operating Properties [Member] | 6055 Nathan Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Plymouth, MN
Encumbrances				0
Initial Cost of Land				1,327,017
Initial Cost of Buildings				4,527,404
Costs Capitalized Subsequent to Acquisition				580,333
Land and Improvements				1,327,017
Building and Improvements				5,107,737
Gross Amount Carried at End of Period	$ 6,434,754			6,434,754
Accumulated Depreciation	$ 625,825			625,825
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,434,754
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 625,825
Operating Properties [Member] | 1400 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				1,157,049
Initial Cost of Buildings				4,620,956
Costs Capitalized Subsequent to Acquisition				1,339,780
Land and Improvements				1,157,049
Building and Improvements				5,960,736
Gross Amount Carried at End of Period	$ 7,117,785			7,117,785
Accumulated Depreciation	$ 2,761,606			2,761,606
Date of Construction or Acquisition	1986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,117,785
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,761,606
Operating Properties [Member] | 1405 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				392,138
Initial Cost of Buildings				1,565,787
Costs Capitalized Subsequent to Acquisition				435,867
Land and Improvements				392,138
Building and Improvements				2,001,655
Gross Amount Carried at End of Period	$ 2,393,793			2,393,793
Accumulated Depreciation	$ 982,366			982,366
Date of Construction or Acquisition	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,393,793
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 982,366
Operating Properties [Member] | 1500 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				972,232
Initial Cost of Buildings				3,892,085
Costs Capitalized Subsequent to Acquisition				912,017
Land and Improvements				972,232
Building and Improvements				4,804,102
Gross Amount Carried at End of Period	$ 5,776,334			5,776,334
Accumulated Depreciation	$ 2,244,165			2,244,165
Date of Construction or Acquisition	1957
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,776,334
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,244,165
Operating Properties [Member] | 1501 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				203,247
Initial Cost of Buildings				811,093
Costs Capitalized Subsequent to Acquisition				368,976
Land and Improvements				203,247
Building and Improvements				1,180,070
Gross Amount Carried at End of Period	$ 1,383,317			1,383,317
Accumulated Depreciation	$ 560,603			560,603
Date of Construction or Acquisition	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,383,317
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 560,603
Operating Properties [Member] | 1601 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				203,247
Initial Cost of Buildings				811,093
Costs Capitalized Subsequent to Acquisition				208,224
Land and Improvements				203,247
Building and Improvements				1,019,318
Gross Amount Carried at End of Period	$ 1,222,565			1,222,565
Accumulated Depreciation	$ 444,758			444,758
Date of Construction or Acquisition	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,222,565
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 444,758
Operating Properties [Member] | 1651 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				203,247
Initial Cost of Buildings				811,093
Costs Capitalized Subsequent to Acquisition				154,435
Land and Improvements				203,247
Building and Improvements				965,529
Gross Amount Carried at End of Period	$ 1,168,776			1,168,776
Accumulated Depreciation	$ 417,118			417,118
Date of Construction or Acquisition	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,168,776
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 417,118
Operating Properties [Member] | 2201-2215 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				1,120,328
Initial Cost of Buildings				3,427,358
Costs Capitalized Subsequent to Acquisition				135,753
Land and Improvements				1,120,328
Building and Improvements				3,563,111
Gross Amount Carried at End of Period	$ 4,683,439			4,683,439
Accumulated Depreciation	$ 369,499			369,499
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,683,439
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 369,499
Operating Properties [Member] | 2250-2270 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				993,015
Initial Cost of Buildings				2,423,174
Costs Capitalized Subsequent to Acquisition				132,660
Land and Improvements				993,015
Building and Improvements				2,555,834
Gross Amount Carried at End of Period	$ 3,548,849			3,548,849
Accumulated Depreciation	$ 289,550			289,550
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,548,849
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 289,550
Operating Properties [Member] | 2280-2300 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				906,947
Initial Cost of Buildings				2,157,802
Costs Capitalized Subsequent to Acquisition				181,920
Land and Improvements				906,947
Building and Improvements				2,339,723
Gross Amount Carried at End of Period	$ 3,246,670			3,246,670
Accumulated Depreciation	$ 289,360			289,360
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,246,670
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 289,360
Operating Properties [Member] | 2301-2329 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				1,268,707
Initial Cost of Buildings				3,079,811
Costs Capitalized Subsequent to Acquisition				146,245
Land and Improvements				1,268,707
Building and Improvements				3,226,056
Gross Amount Carried at End of Period	$ 4,494,763			4,494,763
Accumulated Depreciation	$ 364,496			364,496
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,494,763
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 364,496
Operating Properties [Member] | 3000 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				1,087,554
Initial Cost of Buildings				2,897,117
Costs Capitalized Subsequent to Acquisition				147,218
Land and Improvements				1,087,554
Building and Improvements				3,044,335
Gross Amount Carried at End of Period	$ 4,131,889			4,131,889
Accumulated Depreciation	$ 357,215			357,215
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,131,889
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 357,215
Operating Properties [Member] | 3001-3037 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				1,548,542
Initial Cost of Buildings				3,512,041
Costs Capitalized Subsequent to Acquisition				322,677
Land and Improvements				1,548,542
Building and Improvements				3,834,719
Gross Amount Carried at End of Period	$ 5,383,261			5,383,261
Accumulated Depreciation	$ 513,606			513,606
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,383,261
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 513,606
Operating Properties [Member] | 3012-3050 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				1,112,781
Initial Cost of Buildings				2,763,862
Costs Capitalized Subsequent to Acquisition				232,584
Land and Improvements				1,112,781
Building and Improvements				2,996,445
Gross Amount Carried at End of Period	$ 4,109,226			4,109,226
Accumulated Depreciation	$ 385,453			385,453
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,109,226
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 385,453
Operating Properties [Member] | 595 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				359,933
Initial Cost of Buildings				1,437,116
Costs Capitalized Subsequent to Acquisition				720,249
Land and Improvements				359,933
Building and Improvements				2,157,365
Gross Amount Carried at End of Period	$ 2,517,298			2,517,298
Accumulated Depreciation	$ 1,176,745			1,176,745
Date of Construction or Acquisition	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	$ 1,176,745
Operating Properties [Member] | 601 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				164,413
Initial Cost of Buildings				655,933
Costs Capitalized Subsequent to Acquisition				279,326
Land and Improvements				164,413
Building and Improvements				935,259
Gross Amount Carried at End of Period	$ 1,099,672			1,099,672
Accumulated Depreciation	$ 513,909			513,909
Date of Construction or Acquisition	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	$ 513,909
Operating Properties [Member] | 605 SW 16th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Pompano Beach, FL
Encumbrances				0
Initial Cost of Land				310,778
Initial Cost of Buildings				1,238,324
Costs Capitalized Subsequent to Acquisition				294,844
Land and Improvements				310,178
Building and Improvements				1,533,768
Gross Amount Carried at End of Period	$ 1,843,946			1,843,946
Accumulated Depreciation	$ 626,437			626,437
Date of Construction or Acquisition	1965
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,843,946
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 626,437
Operating Properties [Member] | 1920 West Baseline Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Rialto, CA
Encumbrances				0
Initial Cost of Land				9,361,943
Initial Cost of Buildings				17,970,709
Costs Capitalized Subsequent to Acquisition				453,128
Land and Improvements				9,411,621
Building and Improvements				18,374,159
Gross Amount Carried at End of Period	$ 27,785,780			27,785,780
Accumulated Depreciation	$ 971,239			971,239
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 27,785,780
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 971,239
Operating Properties [Member] | 301 Hill Carter Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				659,456
Initial Cost of Buildings				4,836,010
Costs Capitalized Subsequent to Acquisition				159,898
Land and Improvements				659,456
Building and Improvements				4,995,908
Gross Amount Carried at End of Period	$ 5,655,364			5,655,364
Accumulated Depreciation	$ 2,759,090			2,759,090
Date of Construction or Acquisition	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	$ 2,759,090
Operating Properties [Member] | 4101-4127 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				310,854
Initial Cost of Buildings				2,279,597
Costs Capitalized Subsequent to Acquisition				1,895,397
Land and Improvements				310,854
Building and Improvements				4,174,994
Gross Amount Carried at End of Period	$ 4,485,848			4,485,848
Accumulated Depreciation	$ 1,765,252			1,765,252
Date of Construction or Acquisition	1973
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,485,848
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,765,252
Operating Properties [Member] | 4201-4261 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				693,203
Initial Cost of Buildings				5,083,493
Costs Capitalized Subsequent to Acquisition				2,058,719
Land and Improvements				693,203
Building and Improvements				7,142,212
Gross Amount Carried at End of Period	$ 7,835,415			7,835,415
Accumulated Depreciation	$ 4,003,398			4,003,398
Date of Construction or Acquisition	1975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,835,415
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 4,003,398
Operating Properties [Member] | 4263-4299 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				256,203
Initial Cost of Buildings				2,549,649
Costs Capitalized Subsequent to Acquisition				3,008,422
Land and Improvements				256,203
Building and Improvements				5,558,071
Gross Amount Carried at End of Period	$ 5,814,274			5,814,274
Accumulated Depreciation	$ 2,601,653			2,601,653
Date of Construction or Acquisition	1976
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,814,274
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,601,653
Operating Properties [Member] | 4263F-N. Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				91,476
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				1,911,959
Land and Improvements				91,599
Building and Improvements				1,911,836
Gross Amount Carried at End of Period	$ 2,003,435			2,003,435
Accumulated Depreciation	$ 1,008,379			1,008,379
Date of Construction or Acquisition	1975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,003,435
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,008,379
Operating Properties [Member] | 4301-4335 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				223,696
Initial Cost of Buildings				1,640,435
Costs Capitalized Subsequent to Acquisition				3,048,884
Land and Improvements				223,696
Building and Improvements				4,689,319
Gross Amount Carried at End of Period	$ 4,913,015			4,913,015
Accumulated Depreciation	$ 2,044,300			2,044,300
Date of Construction or Acquisition	1978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,913,015
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,044,300
Operating Properties [Member] | 4337-4379 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				325,303
Initial Cost of Buildings				2,385,557
Costs Capitalized Subsequent to Acquisition				1,375,855
Land and Improvements				325,303
Building and Improvements				3,761,412
Gross Amount Carried at End of Period	$ 4,086,715			4,086,715
Accumulated Depreciation	$ 1,774,030			1,774,030
Date of Construction or Acquisition	1979
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,086,715
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,774,030
Operating Properties [Member] | 4401-4445 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				615,038
Initial Cost of Buildings				4,510,272
Costs Capitalized Subsequent to Acquisition				484,686
Land and Improvements				615,038
Building and Improvements				4,994,958
Gross Amount Carried at End of Period	$ 5,609,996			5,609,996
Accumulated Depreciation	$ 2,755,220			2,755,220
Date of Construction or Acquisition	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,609,996
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,755,220
Operating Properties [Member] | 4447-4491 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				454,056
Initial Cost of Buildings				2,729,742
Costs Capitalized Subsequent to Acquisition				514,146
Land and Improvements				454,056
Building and Improvements				3,243,888
Gross Amount Carried at End of Period	$ 3,697,944			3,697,944
Accumulated Depreciation	$ 1,861,413			1,861,413
Date of Construction or Acquisition	1987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,697,944
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,861,413
Operating Properties [Member] | 4501-4549 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				486,166
Initial Cost of Buildings				3,565,211
Costs Capitalized Subsequent to Acquisition				576,623
Land and Improvements				486,166
Building and Improvements				4,141,834
Gross Amount Carried at End of Period	$ 4,628,000			4,628,000
Accumulated Depreciation	$ 2,282,791			2,282,791
Date of Construction or Acquisition	1981
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,628,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,282,791
Operating Properties [Member] | 4551-4593 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				474,360
Initial Cost of Buildings				3,478,646
Costs Capitalized Subsequent to Acquisition				1,015,357
Land and Improvements				474,360
Building and Improvements				4,494,003
Gross Amount Carried at End of Period	$ 4,968,363			4,968,363
Accumulated Depreciation	$ 2,651,489			2,651,489
Date of Construction or Acquisition	1982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,968,363
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,651,489
Operating Properties [Member] | 4601-4643 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				652,455
Initial Cost of Buildings				4,784,675
Costs Capitalized Subsequent to Acquisition				841,192
Land and Improvements				652,455
Building and Improvements				5,625,867
Gross Amount Carried at End of Period	$ 6,278,322			6,278,322
Accumulated Depreciation	$ 3,287,659			3,287,659
Date of Construction or Acquisition	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,278,322
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,287,659
Operating Properties [Member] | 4645-4683 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				404,616
Initial Cost of Buildings				2,967,187
Costs Capitalized Subsequent to Acquisition				662,014
Land and Improvements				404,616
Building and Improvements				3,629,201
Gross Amount Carried at End of Period	$ 4,033,817			4,033,817
Accumulated Depreciation	$ 1,974,801			1,974,801
Date of Construction or Acquisition	1985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,033,817
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,974,801
Operating Properties [Member] | 4717-4729 Eubank Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				449,447
Initial Cost of Buildings				3,294,697
Costs Capitalized Subsequent to Acquisition				2,230,770
Land and Improvements				452,263
Building and Improvements				5,522,651
Gross Amount Carried at End of Period	$ 5,974,914			5,974,914
Accumulated Depreciation	$ 2,938,959			2,938,959
Date of Construction or Acquisition	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	$ 2,938,959
Operating Properties [Member] | 510 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				261,961
Initial Cost of Buildings				2,110,874
Costs Capitalized Subsequent to Acquisition				414,799
Land and Improvements				262,210
Building and Improvements				2,525,424
Gross Amount Carried at End of Period	$ 2,787,634			2,787,634
Accumulated Depreciation	$ 1,372,360			1,372,360
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,787,634
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,372,360
Operating Properties [Member] | 520 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				486,118
Initial Cost of Buildings				4,083,582
Costs Capitalized Subsequent to Acquisition				716,388
Land and Improvements				486,598
Building and Improvements				4,799,490
Gross Amount Carried at End of Period	$ 5,286,088			5,286,088
Accumulated Depreciation	$ 2,343,100			2,343,100
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,286,088
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,343,100
Operating Properties [Member] | 530 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				266,883
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,621,284
Land and Improvements				334,772
Building and Improvements				2,553,395
Gross Amount Carried at End of Period	$ 2,888,167			2,888,167
Accumulated Depreciation	$ 1,267,264			1,267,264
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,888,167
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,267,264
Operating Properties [Member] | 540 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				742,300
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,428,026
Land and Improvements				1,066,839
Building and Improvements				5,103,487
Gross Amount Carried at End of Period	$ 6,170,326			6,170,326
Accumulated Depreciation	$ 1,155,273			1,155,273
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,170,326
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,155,273
Operating Properties [Member] | 5600-5626 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				489,941
Initial Cost of Buildings				3,592,900
Costs Capitalized Subsequent to Acquisition				634,581
Land and Improvements				489,941
Building and Improvements				4,227,481
Gross Amount Carried at End of Period	$ 4,717,422			4,717,422
Accumulated Depreciation	$ 2,161,964			2,161,964
Date of Construction or Acquisition	1989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,717,422
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,161,964
Operating Properties [Member] | 5601-5659 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				705,660
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,741,770
Land and Improvements				720,100
Building and Improvements				4,727,330
Gross Amount Carried at End of Period	$ 5,447,430			5,447,430
Accumulated Depreciation	$ 2,498,179			2,498,179
Date of Construction or Acquisition	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,447,430
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,498,179
Operating Properties [Member] | 5650-5674 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				644,384
Initial Cost of Buildings				4,025,480
Costs Capitalized Subsequent to Acquisition				353,257
Land and Improvements				644,384
Building and Improvements				4,378,737
Gross Amount Carried at End of Period	$ 5,023,121			5,023,121
Accumulated Depreciation	$ 2,442,189			2,442,189
Date of Construction or Acquisition	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	$ 2,442,189
Operating Properties [Member] | 5700 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				408,729
Initial Cost of Buildings				2,697,348
Costs Capitalized Subsequent to Acquisition				1,248,269
Land and Improvements				408,729
Building and Improvements				3,945,617
Gross Amount Carried at End of Period	$ 4,354,346			4,354,346
Accumulated Depreciation	$ 2,191,052			2,191,052
Date of Construction or Acquisition	1990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,354,346
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,191,052
Operating Properties [Member] | 5701-5799 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				694,644
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,979,622
Land and Improvements				700,503
Building and Improvements				5,973,763
Gross Amount Carried at End of Period	$ 6,674,266			6,674,266
Accumulated Depreciation	$ 2,733,261			2,733,261
Date of Construction or Acquisition	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,674,266
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,733,261
Operating Properties [Member] | 5900 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				676,661
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,998,722
Land and Improvements				687,898
Building and Improvements				4,987,485
Gross Amount Carried at End of Period	$ 5,675,383			5,675,383
Accumulated Depreciation	$ 2,620,834			2,620,834
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,675,383
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,620,834
Operating Properties [Member] | 6000 Eastport Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				872,901
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,490,092
Land and Improvements				901,666
Building and Improvements				7,461,327
Gross Amount Carried at End of Period	$ 8,362,993			8,362,993
Accumulated Depreciation	$ 1,654,411			1,654,411
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,362,993
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,654,411
Operating Properties [Member] | 6530 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Rock Creek, NC
Encumbrances				0
Initial Cost of Land				305,821
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,966,941
Land and Improvements				335,061
Building and Improvements				4,937,701
Gross Amount Carried at End of Period	$ 5,272,762			5,272,762
Accumulated Depreciation	$ 2,292,064			2,292,064
Date of Construction or Acquisition	1999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,272,762
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,292,064
Operating Properties [Member] | 6532 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Rock Creek, NC
Encumbrances				0
Initial Cost of Land				354,903
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,029,022
Land and Improvements				399,988
Building and Improvements				3,983,937
Gross Amount Carried at End of Period	$ 4,383,925			4,383,925
Accumulated Depreciation	$ 2,005,118			2,005,118
Date of Construction or Acquisition	1997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,383,925
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,005,118
Operating Properties [Member] | 13098 George Weber Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Rogers, MN
Encumbrances				0
Initial Cost of Land				895,811
Initial Cost of Buildings				6,004,189
Costs Capitalized Subsequent to Acquisition				342,255
Land and Improvements				895,811
Building and Improvements				6,346,444
Gross Amount Carried at End of Period	$ 7,242,255			7,242,255
Accumulated Depreciation	$ 948,850			948,850
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,242,255
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 948,850
Operating Properties [Member] | 13220 Wilfred Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Rogers, MN
Encumbrances				0
Initial Cost of Land				508,532
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				11,072,977
Land and Improvements				1,396,324
Building and Improvements				10,185,185
Gross Amount Carried at End of Period	$ 11,581,509			11,581,509
Accumulated Depreciation	$ 853,976			853,976
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,581,509
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 853,976
Operating Properties [Member] | 13225 Brockton Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Rogers, MN
Encumbrances				0
Initial Cost of Land				1,048,093
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				10,464,170
Land and Improvements				1,066,159
Building and Improvements				10,446,104
Gross Amount Carried at End of Period	$ 11,512,263			11,512,263
Accumulated Depreciation	$ 786,204			786,204
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,512,263
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 786,204
Operating Properties [Member] | 1070 Windham Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Romeoville, IL
Encumbrances				0
Initial Cost of Land				8,672,143
Initial Cost of Buildings				24,144,864
Costs Capitalized Subsequent to Acquisition				1,238,550
Land and Improvements				8,672,143
Building and Improvements				25,383,414
Gross Amount Carried at End of Period	$ 34,055,557			34,055,557
Accumulated Depreciation	$ 2,699,591			2,699,591
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 34,055,557
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,699,591
Operating Properties [Member] | 1550 Central Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Roselle, IL
Encumbrances				0
Initial Cost of Land				2,884,492
Initial Cost of Buildings				10,439,793
Costs Capitalized Subsequent to Acquisition				485,780
Land and Improvements				2,884,492
Building and Improvements				10,925,573
Gross Amount Carried at End of Period	$ 13,810,065			13,810,065
Accumulated Depreciation	$ 1,361,718			1,361,718
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,810,065
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,361,718
Operating Properties [Member] | 1135 Aviation Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	San Fernando, CA
Encumbrances				0
Initial Cost of Land				3,035,034
Initial Cost of Buildings				2,844,962
Costs Capitalized Subsequent to Acquisition				460,618
Land and Improvements				3,035,034
Building and Improvements				3,305,580
Gross Amount Carried at End of Period	$ 6,340,614			6,340,614
Accumulated Depreciation	$ 392,642			392,642
Date of Construction or Acquisition	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	$ 392,642
Operating Properties [Member] | 8715 Bollman Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Savage, MD
Encumbrances				0
Initial Cost of Land				1,263,237
Initial Cost of Buildings				2,633,210
Costs Capitalized Subsequent to Acquisition				206,384
Land and Improvements				1,263,237
Building and Improvements				2,839,594
Gross Amount Carried at End of Period	$ 4,102,831			4,102,831
Accumulated Depreciation	$ 311,576			311,576
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,102,831
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 311,576
Operating Properties [Member] | 8501 East Raintree Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Scottsdale, AZ
Encumbrances				0
Initial Cost of Land				4,076,412
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				27,621,159
Land and Improvements				4,115,137
Building and Improvements				27,582,434
Gross Amount Carried at End of Period	$ 31,697,571			31,697,571
Accumulated Depreciation	$ 9,367,899			9,367,899
Date of Construction or Acquisition	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	$ 9,367,899
Operating Properties [Member] | 1150 Gateway Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Shakopee, MN
Encumbrances				0
Initial Cost of Land				1,126,865
Initial Cost of Buildings				5,684,178
Costs Capitalized Subsequent to Acquisition				7,627
Land and Improvements				1,126,865
Building and Improvements				5,691,805
Gross Amount Carried at End of Period	$ 6,818,670			6,818,670
Accumulated Depreciation	$ 627,756			627,756
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,818,670
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 627,756
Operating Properties [Member] | 5555 12th Avenue East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Shakopee, MN
Encumbrances				0
Initial Cost of Land				887,285
Initial Cost of Buildings				5,321,200
Costs Capitalized Subsequent to Acquisition				428,118
Land and Improvements				887,285
Building and Improvements				5,749,318
Gross Amount Carried at End of Period	$ 6,636,603			6,636,603
Accumulated Depreciation	$ 739,623			739,623
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,636,603
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 739,623
Operating Properties [Member] | 5651 Innovation Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Shakopee, MN
Encumbrances				0
Initial Cost of Land				1,551,579
Initial Cost of Buildings				9,541,234
Costs Capitalized Subsequent to Acquisition				1,143,179
Land and Improvements				1,552,083
Building and Improvements				10,683,909
Gross Amount Carried at End of Period	$ 12,235,992			12,235,992
Accumulated Depreciation	$ 320,481			320,481
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,235,992
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 320,481
Operating Properties [Member] | 1210 Champion Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Sharonville, OH
Encumbrances				0
Initial Cost of Land				1,337,271
Initial Cost of Buildings				6,135,118
Costs Capitalized Subsequent to Acquisition				1,053,414
Land and Improvements				1,337,271
Building and Improvements				7,188,533
Gross Amount Carried at End of Period	$ 8,525,804			8,525,804
Accumulated Depreciation	$ 1,180,732			1,180,732
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,525,804
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,180,732
Operating Properties [Member] | 9300 Old Scotland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Shippensburg, PA
Encumbrances				0
Initial Cost of Land				10,232,633
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				84,537,189
Land and Improvements				12,933,027
Building and Improvements				81,836,795
Gross Amount Carried at End of Period	$ 94,769,822			94,769,822
Accumulated Depreciation	$ 5,969,153			5,969,153
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 94,769,822
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 5,969,153
Operating Properties [Member] | 3990 Heritage Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Simi Valley, CA
Encumbrances				0
Initial Cost of Land				1,964,140
Initial Cost of Buildings				10,667,267
Costs Capitalized Subsequent to Acquisition				332,505
Land and Improvements				1,964,140
Building and Improvements				10,999,772
Gross Amount Carried at End of Period	$ 12,963,912			12,963,912
Accumulated Depreciation	$ 1,106,485			1,106,485
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,963,912
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,106,485
Operating Properties [Member] | 3654-3668 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	St. Charles, IL
Encumbrances				0
Initial Cost of Land				643,639
Initial Cost of Buildings				1,645,058
Costs Capitalized Subsequent to Acquisition				149,732
Land and Improvements				643,639
Building and Improvements				1,794,790
Gross Amount Carried at End of Period	$ 2,438,429			2,438,429
Accumulated Depreciation	$ 233,225			233,225
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,438,429
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 233,225
Operating Properties [Member] | 3701 Illinois Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	St. Charles, IL
Encumbrances				0
Initial Cost of Land				672,500
Initial Cost of Buildings				1,288,924
Costs Capitalized Subsequent to Acquisition				135,971
Land and Improvements				672,500
Building and Improvements				1,424,895
Gross Amount Carried at End of Period	$ 2,097,395			2,097,395
Accumulated Depreciation	$ 178,406			178,406
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,097,395
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 178,406
Operating Properties [Member] | 3950-3980 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	St. Charles, IL
Encumbrances				0
Initial Cost of Land				851,080
Initial Cost of Buildings				3,027,753
Costs Capitalized Subsequent to Acquisition				193,980
Land and Improvements				851,080
Building and Improvements				3,221,733
Gross Amount Carried at End of Period	$ 4,072,813			4,072,813
Accumulated Depreciation	$ 380,779			380,779
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,072,813
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 380,779
Operating Properties [Member] | 1501 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	St. Petersburg, FL
Encumbrances				0
Initial Cost of Land				283,474
Initial Cost of Buildings				2,230,868
Costs Capitalized Subsequent to Acquisition				165,205
Land and Improvements				283,474
Building and Improvements				2,396,072
Gross Amount Carried at End of Period	$ 2,679,546			2,679,546
Accumulated Depreciation	$ 264,247			264,247
Date of Construction or Acquisition	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	$ 264,247
Operating Properties [Member] | 1527 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	St. Petersburg, FL
Encumbrances				0
Initial Cost of Land				374,284
Initial Cost of Buildings				2,987,226
Costs Capitalized Subsequent to Acquisition				220,944
Land and Improvements				374,284
Building and Improvements				3,208,170
Gross Amount Carried at End of Period	$ 3,582,454			3,582,454
Accumulated Depreciation	$ 351,694			351,694
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,582,454
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 351,694
Operating Properties [Member] | 1551 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	St. Petersburg, FL
Encumbrances				0
Initial Cost of Land				699,797
Initial Cost of Buildings				5,214,438
Costs Capitalized Subsequent to Acquisition				1,045,906
Land and Improvements				699,797
Building and Improvements				6,260,344
Gross Amount Carried at End of Period	$ 6,960,141			6,960,141
Accumulated Depreciation	$ 695,362			695,362
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,960,141
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 695,362
Operating Properties [Member] | 6900 Harbor View Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Suffolk, VA
Encumbrances				0
Initial Cost of Land				904,052
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				8,863,721
Land and Improvements				807,006
Building and Improvements				8,960,767
Gross Amount Carried at End of Period	$ 9,767,773			9,767,773
Accumulated Depreciation	$ 2,548,554			2,548,554
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,767,773
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,548,554
Operating Properties [Member] | 6920 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Suffolk, VA
Encumbrances				0
Initial Cost of Land				603,391
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,811,340
Land and Improvements				2,628,635
Building and Improvements				4,786,096
Gross Amount Carried at End of Period	$ 7,414,731			7,414,731
Accumulated Depreciation	$ 688,557			688,557
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,414,731
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 688,557
Operating Properties [Member] | 6950 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Suffolk, VA
Encumbrances				0
Initial Cost of Land				929,844
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,553,719
Land and Improvements				794,848
Building and Improvements				6,688,715
Gross Amount Carried at End of Period	$ 7,483,563			7,483,563
Accumulated Depreciation	$ 1,988,193			1,988,193
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,483,563
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,988,193
Operating Properties [Member] | 1516 Fryar Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Sumner, WA
Encumbrances				0
Initial Cost of Land				1,675,402
Initial Cost of Buildings				5,079,543
Costs Capitalized Subsequent to Acquisition				805,288
Land and Improvements				1,675,402
Building and Improvements				5,884,831
Gross Amount Carried at End of Period	$ 7,560,233			7,560,233
Accumulated Depreciation	$ 794,666			794,666
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,560,233
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 794,666
Operating Properties [Member] | 3401-3409 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				556,952
Initial Cost of Buildings				3,849,236
Costs Capitalized Subsequent to Acquisition				4,060
Land and Improvements				556,952
Building and Improvements				3,853,296
Gross Amount Carried at End of Period	$ 4,410,248			4,410,248
Accumulated Depreciation	$ 401,117			401,117
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,410,248
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 401,117
Operating Properties [Member] | 3502 Roga Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				201,600
Initial Cost of Buildings				1,263,131
Costs Capitalized Subsequent to Acquisition				75,987
Land and Improvements				201,600
Building and Improvements				1,339,118
Gross Amount Carried at End of Period	$ 1,540,718			1,540,718
Accumulated Depreciation	$ 138,245			138,245
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,540,718
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 138,245
Operating Properties [Member] | 3505 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				936,336
Initial Cost of Buildings				7,155,520
Costs Capitalized Subsequent to Acquisition				1,313
Land and Improvements				936,336
Building and Improvements				7,156,833
Gross Amount Carried at End of Period	$ 8,093,169			8,093,169
Accumulated Depreciation	$ 815,801			815,801
Date of Construction or Acquisition	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	$ 815,801
Operating Properties [Member] | 3608 Queen Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				650,384
Initial Cost of Buildings				4,764,301
Costs Capitalized Subsequent to Acquisition				168,709
Land and Improvements				650,384
Building and Improvements				4,933,010
Gross Amount Carried at End of Period	$ 5,583,394			5,583,394
Accumulated Depreciation	$ 533,313			533,313
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,583,394
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 533,313
Operating Properties [Member] | 5250 Eagle Trail Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				952,860
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,664,502
Land and Improvements				952,860
Building and Improvements				3,664,502
Gross Amount Carried at End of Period	$ 4,617,362			4,617,362
Accumulated Depreciation	$ 1,622,450			1,622,450
Date of Construction or Acquisition	1998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,617,362
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,622,450
Operating Properties [Member] | 5501-5519 Pioneer Park Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				162,000
Initial Cost of Buildings				1,613,000
Costs Capitalized Subsequent to Acquisition				1,013,160
Land and Improvements				262,416
Building and Improvements				2,525,744
Gross Amount Carried at End of Period	$ 2,788,160			2,788,160
Accumulated Depreciation	$ 1,404,974			1,404,974
Date of Construction or Acquisition	1981
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,788,160
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,404,974
Operating Properties [Member] | 5690-5694 Crenshaw Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				181,923
Initial Cost of Buildings				1,812,496
Costs Capitalized Subsequent to Acquisition				1,023,370
Land and Improvements				181,923
Building and Improvements				2,835,866
Gross Amount Carried at End of Period	$ 3,017,789			3,017,789
Accumulated Depreciation	$ 1,331,285			1,331,285
Date of Construction or Acquisition	1979
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,017,789
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,331,285
Operating Properties [Member] | 8110 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				912,663
Initial Cost of Buildings				5,425,143
Costs Capitalized Subsequent to Acquisition				317,687
Land and Improvements				912,663
Building and Improvements				5,742,830
Gross Amount Carried at End of Period	$ 6,655,493			6,655,493
Accumulated Depreciation	$ 691,053			691,053
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,655,493
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 691,053
Operating Properties [Member] | 8130 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				655,668
Initial Cost of Buildings				4,132,076
Costs Capitalized Subsequent to Acquisition				160,693
Land and Improvements				655,668
Building and Improvements				4,292,769
Gross Amount Carried at End of Period	$ 4,948,437			4,948,437
Accumulated Depreciation	$ 544,050			544,050
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,948,437
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 544,050
Operating Properties [Member] | 9020 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				1,718,496
Initial Cost of Buildings				11,697,381
Costs Capitalized Subsequent to Acquisition				912,448
Land and Improvements				1,718,496
Building and Improvements				12,609,829
Gross Amount Carried at End of Period	$ 14,328,325			14,328,325
Accumulated Depreciation	$ 1,340,882			1,340,882
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 14,328,325
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,340,882
Operating Properties [Member] | 9110 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				1,203,200
Initial Cost of Buildings				7,979,540
Costs Capitalized Subsequent to Acquisition				197,450
Land and Improvements				1,203,200
Building and Improvements				8,176,990
Gross Amount Carried at End of Period	$ 9,380,190			9,380,190
Accumulated Depreciation	$ 911,735			911,735
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,380,190
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 911,735
Operating Properties [Member] | 9203 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				754,832
Initial Cost of Buildings				4,966,864
Costs Capitalized Subsequent to Acquisition				(33,459)
Land and Improvements				754,832
Building and Improvements				4,933,405
Gross Amount Carried at End of Period	$ 5,688,237			5,688,237
Accumulated Depreciation	$ 569,711			569,711
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,688,237
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 569,711
Operating Properties [Member] | 9319 Peach Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				612,536
Initial Cost of Buildings				4,168,473
Costs Capitalized Subsequent to Acquisition				9,700
Land and Improvements				612,536
Building and Improvements				4,178,173
Gross Amount Carried at End of Period	$ 4,790,709			4,790,709
Accumulated Depreciation	$ 444,092			444,092
Date of Construction or Acquisition	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	$ 444,092
Operating Properties [Member] | 9704 Solar Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				374,548
Initial Cost of Buildings				1,354,800
Costs Capitalized Subsequent to Acquisition				775,513
Land and Improvements				374,548
Building and Improvements				2,130,313
Gross Amount Carried at End of Period	$ 2,504,861			2,504,861
Accumulated Depreciation	$ 187,056			187,056
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,504,861
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 187,056
Operating Properties [Member] | 9945 Currie Davis Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				1,134,286
Initial Cost of Buildings				9,241,807
Costs Capitalized Subsequent to Acquisition				380,833
Land and Improvements				1,134,286
Building and Improvements				9,622,639
Gross Amount Carried at End of Period	$ 10,756,925			10,756,925
Accumulated Depreciation	$ 1,062,618			1,062,618
Date of Construction or Acquisition	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	$ 1,062,618
Operating Properties [Member] | 1850 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tempe, AZ
Encumbrances				0
Initial Cost of Land				3,975,600
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				23,088,843
Land and Improvements				3,975,600
Building and Improvements				23,088,843
Gross Amount Carried at End of Period	$ 27,064,443			27,064,443
Accumulated Depreciation	$ 1,035,343			1,035,343
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 27,064,443
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,035,343
Operating Properties [Member] | 1858 E Encanto Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tempe, AZ
Encumbrances				0
Initial Cost of Land				877,611
Initial Cost of Buildings				4,485,427
Costs Capitalized Subsequent to Acquisition				310,053
Land and Improvements				877,611
Building and Improvements				4,795,480
Gross Amount Carried at End of Period	$ 5,673,091			5,673,091
Accumulated Depreciation	$ 532,163			532,163
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,673,091
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 532,163
Operating Properties [Member] | 475 W Vaughn St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tempe, AZ
Encumbrances				0
Initial Cost of Land				1,112,245
Initial Cost of Buildings				2,260,348
Costs Capitalized Subsequent to Acquisition				272,243
Land and Improvements				1,112,245
Building and Improvements				2,532,591
Gross Amount Carried at End of Period	$ 3,644,836			3,644,836
Accumulated Depreciation	$ 329,197			329,197
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,644,836
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 329,197
Operating Properties [Member] | 921 South Park Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tempe, AZ
Encumbrances				0
Initial Cost of Land				1,192,820
Initial Cost of Buildings				1,580,155
Costs Capitalized Subsequent to Acquisition				480,998
Land and Improvements				1,192,820
Building and Improvements				2,061,154
Gross Amount Carried at End of Period	$ 3,253,974			3,253,974
Accumulated Depreciation	$ 386,618			386,618
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,253,974
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 386,618
Operating Properties [Member] | 8313 West Pierce Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tolleson, AZ
Encumbrances				0
Initial Cost of Land				2,295,090
Initial Cost of Buildings				9,079,811
Costs Capitalized Subsequent to Acquisition				3,531,535
Land and Improvements				2,295,090
Building and Improvements				12,611,346
Gross Amount Carried at End of Period	$ 14,906,436			14,906,436
Accumulated Depreciation	$ 3,862,955			3,862,955
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 14,906,436
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,862,955
Operating Properties [Member] | 8591 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tolleson, AZ
Encumbrances				0
Initial Cost of Land				1,574,912
Initial Cost of Buildings				7,308,021
Costs Capitalized Subsequent to Acquisition				356,128
Land and Improvements				1,574,912
Building and Improvements				7,664,149
Gross Amount Carried at End of Period	$ 9,239,061			9,239,061
Accumulated Depreciation	$ 970,131			970,131
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,239,061
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 970,131
Operating Properties [Member] | 8601 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tolleson, AZ
Encumbrances				0
Initial Cost of Land				1,524,603
Initial Cost of Buildings				6,352,070
Costs Capitalized Subsequent to Acquisition				920,094
Land and Improvements				1,524,603
Building and Improvements				7,272,164
Gross Amount Carried at End of Period	$ 8,796,767			8,796,767
Accumulated Depreciation	$ 1,175,768			1,175,768
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,796,767
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,175,768
Operating Properties [Member] | 5111 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tucker, GA
Encumbrances				0
Initial Cost of Land				435,776
Initial Cost of Buildings				1,875,685
Costs Capitalized Subsequent to Acquisition				411,280
Land and Improvements				435,776
Building and Improvements				2,286,966
Gross Amount Carried at End of Period	$ 2,722,742			2,722,742
Accumulated Depreciation	$ 344,804			344,804
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,722,742
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 344,804
Operating Properties [Member] | 5151 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tucker, GA
Encumbrances				0
Initial Cost of Land				345,061
Initial Cost of Buildings				1,428,840
Costs Capitalized Subsequent to Acquisition				224,775
Land and Improvements				345,061
Building and Improvements				1,653,615
Gross Amount Carried at End of Period	$ 1,998,676			1,998,676
Accumulated Depreciation	$ 273,948			273,948
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,998,676
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 273,948
Operating Properties [Member] | 1100 17th Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Washington, DC
Encumbrances				0
Initial Cost of Land				16,558,660
Initial Cost of Buildings				32,223,978
Costs Capitalized Subsequent to Acquisition				1,495,642
Land and Improvements				16,558,660
Building and Improvements				33,719,620
Gross Amount Carried at End of Period	$ 50,278,280			50,278,280
Accumulated Depreciation	$ 6,532,221			6,532,221
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 50,278,280
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 6,532,221
Operating Properties [Member] | 2100 M Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Washington, DC
Encumbrances				0
Initial Cost of Land				70,000,000
Initial Cost of Buildings				55,123,783
Costs Capitalized Subsequent to Acquisition				104,422
Land and Improvements				70,000,000
Building and Improvements				55,228,205
Gross Amount Carried at End of Period	$ 125,228,205			125,228,205
Accumulated Depreciation	$ 7,931,434			7,931,434
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 125,228,205
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 7,931,434
Operating Properties [Member] | 400-500 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Chester, PA
Encumbrances				0
Initial Cost of Land				845,846
Initial Cost of Buildings				6,809,025
Costs Capitalized Subsequent to Acquisition				1,042,610
Land and Improvements				845,846
Building and Improvements				7,851,635
Gross Amount Carried at End of Period	$ 8,697,481			8,697,481
Accumulated Depreciation	$ 3,474,894			3,474,894
Date of Construction or Acquisition	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,697,481
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 3,474,894
Operating Properties [Member] | 600 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Chester, PA
Encumbrances				0
Initial Cost of Land				664,899
Initial Cost of Buildings				5,352,410
Costs Capitalized Subsequent to Acquisition				807,914
Land and Improvements				664,899
Building and Improvements				6,160,324
Gross Amount Carried at End of Period	$ 6,825,223			6,825,223
Accumulated Depreciation	$ 2,950,204			2,950,204
Date of Construction or Acquisition	1988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,825,223
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,950,204
Operating Properties [Member] | 1400 Powis Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Chicago, IL
Encumbrances				0
Initial Cost of Land				578,314
Initial Cost of Buildings				2,448,562
Costs Capitalized Subsequent to Acquisition				73,377
Land and Improvements				578,314
Building and Improvements				2,521,939
Gross Amount Carried at End of Period	$ 3,100,253			3,100,253
Accumulated Depreciation	$ 259,204			259,204
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,100,253
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 259,204
Operating Properties [Member] | 1 Kings Hill Aveune [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Malling, UK
Encumbrances				0
Initial Cost of Land				4,288,389
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,874,032
Land and Improvements				3,089,043
Building and Improvements				8,073,378
Gross Amount Carried at End of Period	$ 11,162,421			11,162,421
Accumulated Depreciation	$ 2,233,644			2,233,644
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,162,421
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,233,644
Operating Properties [Member] | 42 Kings Hill Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Malling, UK
Encumbrances				0
Initial Cost of Land				5,397,739
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				8,788,645
Land and Improvements				3,353,552
Building and Improvements				10,832,832
Gross Amount Carried at End of Period	$ 14,186,384			14,186,384
Accumulated Depreciation	$ 2,588,491			2,588,491
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 14,186,384
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,588,491
Operating Properties [Member] | Liberty Square, Block 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Malling, UK
Encumbrances				0
Initial Cost of Land				159,232
Initial Cost of Buildings				1,622,551
Costs Capitalized Subsequent to Acquisition				448,417
Land and Improvements				248,933
Building and Improvements				1,981,268
Gross Amount Carried at End of Period	$ 2,230,201			2,230,201
Accumulated Depreciation	$ 584,097			584,097
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,230,201
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 584,097
Operating Properties [Member] | Liberty Square, Block 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Malling, UK
Encumbrances				0
Initial Cost of Land				199,150
Initial Cost of Buildings				1,614,217
Costs Capitalized Subsequent to Acquisition				474,450
Land and Improvements				312,301
Building and Improvements				1,975,516
Gross Amount Carried at End of Period	$ 2,287,817			2,287,817
Accumulated Depreciation	$ 566,264			566,264
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,287,817
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 566,264
Operating Properties [Member] | Liberty Square, Block 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Malling, UK
Encumbrances				0
Initial Cost of Land				129,830
Initial Cost of Buildings				1,141,141
Costs Capitalized Subsequent to Acquisition				327,841
Land and Improvements				202,258
Building and Improvements				1,396,554
Gross Amount Carried at End of Period	$ 1,598,812			1,598,812
Accumulated Depreciation	$ 395,755			395,755
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,598,812
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 395,755
Operating Properties [Member] | Liberty Square, Block 5 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Malling, UK
Encumbrances				0
Initial Cost of Land				71,377
Initial Cost of Buildings				735,993
Costs Capitalized Subsequent to Acquisition				200,989
Land and Improvements				109,464
Building and Improvements				898,895
Gross Amount Carried at End of Period	$ 1,008,359			1,008,359
Accumulated Depreciation	$ 254,835			254,835
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,008,359
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 254,835
Operating Properties [Member] | 1400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Palm Beach, FL
Encumbrances				0
Initial Cost of Land				2,454,972
Initial Cost of Buildings				5,312,829
Costs Capitalized Subsequent to Acquisition				376,502
Land and Improvements				2,454,972
Building and Improvements				5,689,331
Gross Amount Carried at End of Period	$ 8,144,303			8,144,303
Accumulated Depreciation	$ 711,830			711,830
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,144,303
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 711,830
Operating Properties [Member] | 300 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Palm Beach, FL
Encumbrances				0
Initial Cost of Land				1,177,064
Initial Cost of Buildings				2,102,451
Costs Capitalized Subsequent to Acquisition				160,370
Land and Improvements				1,177,064
Building and Improvements				2,262,821
Gross Amount Carried at End of Period	$ 3,439,885			3,439,885
Accumulated Depreciation	$ 272,510			272,510
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,439,885
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 272,510
Operating Properties [Member] | 400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Palm Beach, FL
Encumbrances				0
Initial Cost of Land				1,029,595
Initial Cost of Buildings				1,728,187
Costs Capitalized Subsequent to Acquisition				178,025
Land and Improvements				1,029,595
Building and Improvements				1,906,212
Gross Amount Carried at End of Period	$ 2,935,807			2,935,807
Accumulated Depreciation	$ 249,304			249,304
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,935,807
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 249,304
Operating Properties [Member] | 2935 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Weston, FL
Encumbrances				0
Initial Cost of Land				4,682,521
Initial Cost of Buildings				25,905,126
Costs Capitalized Subsequent to Acquisition				1,345,838
Land and Improvements				4,682,521
Building and Improvements				27,250,964
Gross Amount Carried at End of Period	$ 31,933,485			31,933,485
Accumulated Depreciation	$ 2,533,465			2,533,465
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 31,933,485
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 2,533,465
Operating Properties [Member] | 2945 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Weston, FL
Encumbrances				0
Initial Cost of Land				2,345,242
Initial Cost of Buildings				13,973,766
Costs Capitalized Subsequent to Acquisition				333,227
Land and Improvements				2,345,242
Building and Improvements				14,306,993
Gross Amount Carried at End of Period	$ 16,652,235			16,652,235
Accumulated Depreciation	$ 1,343,050			1,343,050
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 16,652,235
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 1,343,050
Operating Properties [Member] | 43-47 Hintz Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Wheeling, IL
Encumbrances				0
Initial Cost of Land				2,051,093
Initial Cost of Buildings				18,283,480
Costs Capitalized Subsequent to Acquisition				537,835
Land and Improvements				2,051,093
Building and Improvements				18,821,316
Gross Amount Carried at End of Period	$ 20,872,409			20,872,409
Accumulated Depreciation	$ 1,890,597			1,890,597
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 20,872,409
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	1,890,597
Operating Properties [Member] | Subtotal Operating Real Estate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances				55,484,649
Initial Cost of Land				1,035,528,258
Initial Cost of Buildings				2,250,324,535
Costs Capitalized Subsequent to Acquisition				2,310,537,775
Land and Improvements				1,094,469,939
Building and Improvements				4,501,920,629
Gross Amount Carried at End of Period	5,596,390,568			5,596,390,568
Accumulated Depreciation	940,114,836			940,114,836
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	5,596,390,568
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 940,114,836
Operating Properties [Member] | 800 Uline Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Allentown, PA
Encumbrances				0
Initial Cost of Land				14,754,000
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				41,114,385
Land and Improvements				17,126,315
Building and Improvements				38,742,070
Gross Amount Carried at End of Period	$ 55,868,385			55,868,385
Accumulated Depreciation	$ 376,857			376,857
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 55,868,385
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 376,857
Operating Properties [Member] | 11020 Holly Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Dayton, MN
Encumbrances				0
Initial Cost of Land				2,536,731
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				12,256,969
Land and Improvements				2,536,731
Building and Improvements				12,256,969
Gross Amount Carried at End of Period	$ 14,793,700			14,793,700
Accumulated Depreciation	$ 157,560			157,560
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 14,793,700
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 157,560
Operating Properties [Member] | 333 Howard Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Des Plaines, IL
Encumbrances				0
Initial Cost of Land				7,928,724
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				14,263,106
Land and Improvements				7,928,724
Building and Improvements				14,263,106
Gross Amount Carried at End of Period	$ 22,191,830			22,191,830
Accumulated Depreciation	$ 334,384			334,384
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 22,191,830
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 334,384
Operating Properties [Member] | 120 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greer, SC
Encumbrances				0
Initial Cost of Land				1,243,100
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,590,252
Land and Improvements				1,243,100
Building and Improvements				6,590,252
Gross Amount Carried at End of Period	$ 7,833,352			7,833,352
Accumulated Depreciation	$ 257,972			257,972
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,833,352
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 257,972
Operating Properties [Member] | 130 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greer, SC
Encumbrances				0
Initial Cost of Land				1,171,160
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				6,034,563
Land and Improvements				1,171,160
Building and Improvements				6,034,563
Gross Amount Carried at End of Period	$ 7,205,723			7,205,723
Accumulated Depreciation	$ 135,801			135,801
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,205,723
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 135,801
Operating Properties [Member] | 4485 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				1,827,595
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,597,239
Land and Improvements				1,044,288
Building and Improvements				3,380,546
Gross Amount Carried at End of Period	$ 4,424,834			4,424,834
Accumulated Depreciation	$ 43,002			43,002
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,424,834
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 43,002
Operating Properties [Member] | 11250 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Medley, FL
Encumbrances				0
Initial Cost of Land				4,798,886
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				9,282,537
Land and Improvements				4,798,886
Building and Improvements				9,282,537
Gross Amount Carried at End of Period	$ 14,081,423			14,081,423
Accumulated Depreciation	$ 223,407			223,407
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 14,081,423
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 223,407
Operating Properties [Member] | 1200 Intrepid Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				404,883
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				8,102,718
Land and Improvements				127,741
Building and Improvements				8,379,860
Gross Amount Carried at End of Period	$ 8,507,601			8,507,601
Accumulated Depreciation	$ 85,391			85,391
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,507,601
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 85,391
Operating Properties [Member] | 351 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances
Initial Cost of Land				359,864
Initial Cost of Buildings
Costs Capitalized Subsequent to Acquisition				16,067,260
Land and Improvements				367,016
Building and Improvements				16,060,108
Gross Amount Carried at End of Period	$ 16,427,124			16,427,124
Accumulated Depreciation	$ 11,605			11,605
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 16,427,124
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 11,605
Operating Properties [Member] | 4701 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				419,107
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				13,298,950
Land and Improvements				435,763
Building and Improvements				13,282,294
Gross Amount Carried at End of Period	$ 13,718,057			13,718,057
Accumulated Depreciation	$ 313,669			313,669
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,718,057
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 313,669
Operating Properties [Member] | 5800 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Richmond, VA
Encumbrances				0
Initial Cost of Land				604,146
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,590,970
Land and Improvements				604,146
Building and Improvements				7,590,970
Gross Amount Carried at End of Period	$ 8,195,116			8,195,116
Accumulated Depreciation	$ 195,005			195,005
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,195,116
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 195,005
Operating Properties [Member] | 5800 Technology Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Sandston, VA
Encumbrances				0
Initial Cost of Land				1,741,867
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				12,004,702
Land and Improvements				1,744,160
Building and Improvements				12,002,409
Gross Amount Carried at End of Period	$ 13,746,569			13,746,569
Accumulated Depreciation	$ 125,617			125,617
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,746,569
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 125,617
Operating Properties [Member] | 1910 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tempe, AZ
Encumbrances				0
Initial Cost of Land				4,693,504
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				23,579,039
Land and Improvements				4,693,504
Building and Improvements				23,579,039
Gross Amount Carried at End of Period	$ 28,272,543			28,272,543
Accumulated Depreciation	$ 840,894			840,894
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 28,272,543
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 840,894
Operating Properties [Member] | 2040 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tempe, AZ
Encumbrances				0
Initial Cost of Land				2,689,302
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				10,201,921
Land and Improvements				2,633,851
Building and Improvements				10,257,372
Gross Amount Carried at End of Period	$ 12,891,223			12,891,223
Accumulated Depreciation	$ 131,584			131,584
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,891,223
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 131,584
Operating Properties [Member] | Maximum [Member] | 627 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1467 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1501 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 869 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 901 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8620 Congdon Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 200 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 250 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 400 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 650 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 651 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 700 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 705 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7165 Ambassador Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7248 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7339 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7437 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8014 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8150 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8250 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8400 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6330 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6350 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6370 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6390 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6520 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6540 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6560 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6580 Snowdrift Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7620 Cetronia Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 700 Uline Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11222 Melrose Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3095 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3097 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7030 Buford Highway NE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | Barton 150 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1055-1071 Kingsland Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4606 Richlynn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11800 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11850 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11900 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 12104 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 12200 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 12240 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1071 Thorndale Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1260-1274 Ellis Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 371-377 Meyer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 850-880 Devon Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10 Emery Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2785 Commerce Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1455 Remington Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 150 E Crossroads Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 553 S Joliet Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 400 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8201 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8500 Industrial Bouldvard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 860 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1485 W Commerce Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 40 Logistics Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 135-195 East Elk Trail [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 515 Kehoe Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1413 Bradley Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3200 Belmeade Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1475 Nitterhouse Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 95 Kriner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9000 109th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11701 Goodrich Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 12810 Virkler Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2700 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2701 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2730 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2801 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3000 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3005 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4045 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4047 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4525 Statesville Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4835 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4925 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5032 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5033 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5039 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8910 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8916 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8924 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2601 Indian River Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1540 S 54th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4650 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4750 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9645 Gerwig Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2550 John Glenn Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3800 Twin Creeks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 330 South Royal Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 455 Airline Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2130 Baldwin Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 329-333 Herrod Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1250 Hall Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1680 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1700 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2670 Breckinridge Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 170 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 190 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 265 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 285 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1000 Parliament Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4226 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4227 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4234 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4300 Emperor Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3169 Dodd Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3711 Kennebec Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 917 Lone Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10301-10305 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10321 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10333 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10349-10357 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10365-10375 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10393-10394 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7075 Flying Cloud Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7078 Shady Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7777 Golden Triangle Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2250 Arthur Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6600 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6675 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7351 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 21705-21707 Mississippi Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 27143 S Baseline Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1800 Donaldson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6880 Fairfield Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7000-7018 Fairfield Business [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10721 Jasmine Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2000 Southpointe Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1400 NW 65th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6500 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6501 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6600 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9601 Cosner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5410 - 5430 Northwest 33rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 12601 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 12641 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 12681-12691 Pala Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 850 S Jupiter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2510 W Main Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4251 North Highway 121 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 116 Pleasant Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 25 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 45 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2011 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2121 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 800 Commerce Parkway West Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 110 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 140 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1487 South Highway 101 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2727 London Grove Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11835 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11841 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1560 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1575 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7361 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7460 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7462 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 500 McCarthy Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 600 Industrial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7195 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7253 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 12537 Cerise Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1010 Petersburg Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 785 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 805 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 825 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 845 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1498 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4183 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4189 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4195 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4328, 4336 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4344 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4380 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4388 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4475 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4500 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4501 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4523 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4524 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | Unit 5 Logix Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1515 6th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1600 5th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1000 South Loop West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10241 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10245 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10301 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10305 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1050 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10607 Haddington Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10720 West Sam Houston Pkwy N [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10735 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10739 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11201 Greens Crossing Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11220 Ella Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1283 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1287 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1291 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1416 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1420 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 14200 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1424 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1428 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 14300 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 14400 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 15102 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 15150 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 16330 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 16405 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 16420 West Hardy Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 16445 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1646 Rankin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1655 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 16580 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 16602 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 16605 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1665 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 16680 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 16685 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1755 Trans Central Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4301 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4401 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4501 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5200 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5250 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5500 N. Sam Houston Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8017 Pinemont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8272 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8282 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8301 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8303 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 850 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 860 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8801-19 & 8821-49 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8802-8824 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8825-8839 N Sam Houston Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8850-8872 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | Liberty 11 at Central Green [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | Cabot III UK1B01 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1011 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1035 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1549 W Glenlake Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 901 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 925 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8241 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8242 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8246 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1305 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1325 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3600 Cobb International Bld NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | Unit 1 Bear Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2100 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2201 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2300 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2301 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2500 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2520 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2560 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2700 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2900 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3000 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3100 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3200 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3400 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3500 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3600 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3602 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3604 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 440 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 460 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 650 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 680 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1700 Interstate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5801 Columbia Park Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11425 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11503 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1701 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1842 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1902 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 640 S State Road 39 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7528 Walker Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8301 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8500 Willard Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 875 Maxham Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8742 Congdon Hill Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7533 Industrial Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10, 20 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 100 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1001 Cedar Hollow Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11,15 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 12,14,16 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 14 Lee Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 18 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 200 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 300-400 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 311 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 425 Old Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 45 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 50 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 500 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 60 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 600 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 700 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1169 Canton Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 65 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 75 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 126-132 Liberty Industrial Pkw [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 95-115 Liberty Industrial Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11150 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11401 NW 134th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11450 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 456 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 21 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 22750 Cactus Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 323 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 324 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 619 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 701 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1879 Lamont Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 350 Winmeyer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4000 E Airport Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1000 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10003 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10511 & 10611 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10771 Palm Bay Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1090 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1400-1440 Central Florida Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1902 Cypress Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2000 Park Oaks Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2202 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2212 Taft Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2256 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2351 Investors Row [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2400 South Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2412 Sand Lake Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2416 Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6200 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6501 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6918 Presidents Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6923 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7022 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7100 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7101 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 7315 Kingspointe Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 851 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 950 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 29 Liberty Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9550 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9600 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9700 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 150 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 201 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4000 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4050 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4300 South 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4751 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4775 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8th & Walnut Streets [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2626 South 7th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 563 South 63rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1000 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1901 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1909 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3605 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3701 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 800 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 900 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9801 80th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 14630-14650 28th Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2920 Northwest Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5905 Trenton Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6055 Nathan Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1400 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1405 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1500 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1501 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1601 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1651 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2201-2215 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2250-2270 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2280-2300 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2301-2329 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3000 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3001-3037 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3012-3050 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 595 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 601 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 605 SW 16th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1920 West Baseline Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 301 Hill Carter Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4101-4127 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4201-4261 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4263-4299 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4263F-N. Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4301-4335 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4337-4379 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4401-4445 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4447-4491 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4501-4549 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4551-4593 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4601-4643 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4645-4683 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4717-4729 Eubank Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 510 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 520 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 530 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 540 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5600-5626 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5601-5659 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5650-5674 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5700 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5701-5799 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5900 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6000 Eastport Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6530 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6532 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 13098 George Weber Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 13220 Wilfred Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 13225 Brockton Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1070 Windham Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1550 Central Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1135 Aviation Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8715 Bollman Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8501 East Raintree Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1150 Gateway Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5555 12th Avenue East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5651 Innovation Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1210 Champion Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9300 Old Scotland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3990 Heritage Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3654-3668 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3701 Illinois Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3950-3980 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1501 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1527 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1551 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6900 Harbor View Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6920 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 6950 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1516 Fryar Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3401-3409 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3502 Roga Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3505 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 3608 Queen Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5250 Eagle Trail Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5501-5519 Pioneer Park Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5690-5694 Crenshaw Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8110 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8130 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9020 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9110 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9203 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9319 Peach Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9704 Solar Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 9945 Currie Davis Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1850 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1858 E Encanto Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 475 W Vaughn St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 921 South Park Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8313 West Pierce Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8591 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 8601 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5111 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5151 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1100 17th Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2100 M Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 400-500 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 600 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1400 Powis Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1 Kings Hill Aveune [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 42 Kings Hill Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | Liberty Square, Block 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | Liberty Square, Block 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | Liberty Square, Block 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | Liberty Square, Block 5 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 300 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2935 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2945 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 43-47 Hintz Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 800 Uline Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11020 Holly Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 333 Howard Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 120 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 130 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4485 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 10720 West Sam Houston Parkway North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 11250 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1200 Intrepid Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 351 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 4701 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5800 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 5800 Technology Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 1910 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Maximum [Member] | 2040 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	40 years
Operating Properties [Member] | Minimum [Member] | 627 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1467 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1501 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 869 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 901 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8620 Congdon Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 200 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 250 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 400 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 650 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 651 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 700 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 705 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7165 Ambassador Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7248 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7339 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7437 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8014 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8150 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8250 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8400 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6330 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6350 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6370 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6390 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6520 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6540 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6560 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6580 Snowdrift Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7620 Cetronia Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 700 Uline Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11222 Melrose Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3095 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3097 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7030 Buford Highway NE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | Barton 150 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1055-1071 Kingsland Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4606 Richlynn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11800 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11850 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11900 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 12104 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 12200 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 12240 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1071 Thorndale Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1260-1274 Ellis Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 371-377 Meyer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 850-880 Devon Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10 Emery Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2785 Commerce Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1455 Remington Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 150 E Crossroads Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 553 S Joliet Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 400 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8201 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8500 Industrial Bouldvard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 860 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1485 W Commerce Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 40 Logistics Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 135-195 East Elk Trail [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 515 Kehoe Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1413 Bradley Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3200 Belmeade Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1475 Nitterhouse Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 95 Kriner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9000 109th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11701 Goodrich Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 12810 Virkler Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2700 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2701 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2730 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2801 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3000 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3005 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4045 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4047 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4525 Statesville Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4835 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4925 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5032 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5033 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5039 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8910 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8916 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8924 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2601 Indian River Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1540 S 54th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4650 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4750 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9645 Gerwig Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2550 John Glenn Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3800 Twin Creeks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 330 South Royal Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 455 Airline Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2130 Baldwin Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 329-333 Herrod Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1250 Hall Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1680 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1700 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2670 Breckinridge Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 170 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 190 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 265 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 285 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1000 Parliament Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4226 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4227 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4234 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4300 Emperor Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3169 Dodd Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3711 Kennebec Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 917 Lone Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10301-10305 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10321 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10333 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10349-10357 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10365-10375 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10393-10394 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7075 Flying Cloud Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7078 Shady Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7777 Golden Triangle Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2250 Arthur Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6600 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6675 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7351 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 21705-21707 Mississippi Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 27143 S Baseline Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1800 Donaldson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6880 Fairfield Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7000-7018 Fairfield Business [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10721 Jasmine Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2000 Southpointe Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1400 NW 65th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6500 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6501 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6600 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9601 Cosner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5410 - 5430 Northwest 33rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 12601 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 12641 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 12681-12691 Pala Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 850 S Jupiter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2510 W Main Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4251 North Highway 121 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 116 Pleasant Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 25 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 45 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2011 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2121 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 800 Commerce Parkway West Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 110 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 140 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1487 South Highway 101 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2727 London Grove Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11835 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11841 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1560 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1575 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7361 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7460 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7462 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 500 McCarthy Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 600 Industrial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7195 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7253 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 12537 Cerise Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1010 Petersburg Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 785 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 805 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 825 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 845 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1498 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4183 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4189 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4195 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4328, 4336 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4344 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4380 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4388 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4475 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4500 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4501 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4523 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4524 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | Unit 5 Logix Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1515 6th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1600 5th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1000 South Loop West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10241 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10245 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10301 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10305 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1050 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10607 Haddington Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10720 West Sam Houston Pkwy N [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10735 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10739 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11201 Greens Crossing Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11220 Ella Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1283 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1287 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1291 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1416 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1420 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 14200 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1424 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1428 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 14300 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 14400 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 15102 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 15150 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 16330 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 16405 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 16420 West Hardy Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 16445 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1646 Rankin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1655 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 16580 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 16602 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 16605 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1665 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 16680 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 16685 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1755 Trans Central Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4301 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4401 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4501 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5200 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5250 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5500 N. Sam Houston Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8017 Pinemont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8272 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8282 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8301 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8303 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 850 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 860 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8801-19 & 8821-49 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8802-8824 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8825-8839 N Sam Houston Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8850-8872 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | Liberty 11 at Central Green [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | Cabot III UK1B01 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1011 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1035 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1549 W Glenlake Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 901 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 925 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8241 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8242 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8246 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1305 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1325 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3600 Cobb International Bld NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | Unit 1 Bear Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2100 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2201 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2300 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2301 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2500 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2520 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2560 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2700 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2900 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3000 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3100 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3200 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3400 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3500 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3600 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3602 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3604 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 440 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 460 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 650 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 680 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1700 Interstate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5801 Columbia Park Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11425 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11503 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1701 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1842 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1902 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 640 S State Road 39 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7528 Walker Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8301 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8500 Willard Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 875 Maxham Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8742 Congdon Hill Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7533 Industrial Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10, 20 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 100 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1001 Cedar Hollow Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11,15 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 12,14,16 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 14 Lee Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 18 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 200 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 300-400 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 311 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 425 Old Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 45 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 50 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 500 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 60 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 600 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 700 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1169 Canton Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 65 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 75 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 126-132 Liberty Industrial Pkw [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 95-115 Liberty Industrial Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11150 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11401 NW 134th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11450 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 456 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 21 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 22750 Cactus Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 323 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 324 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 619 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 701 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1879 Lamont Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 350 Winmeyer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4000 E Airport Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1000 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10003 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10511 & 10611 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10771 Palm Bay Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1090 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1400-1440 Central Florida Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1902 Cypress Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2000 Park Oaks Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2202 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2212 Taft Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2256 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2351 Investors Row [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2400 South Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2412 Sand Lake Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2416 Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6200 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6501 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6918 Presidents Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6923 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7022 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7100 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7101 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 7315 Kingspointe Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 851 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 950 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 29 Liberty Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9550 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9600 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9700 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 150 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 201 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4000 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4050 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4300 South 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4751 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4775 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8th & Walnut Streets [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2626 South 7th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 563 South 63rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1000 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1901 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1909 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3605 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3701 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 800 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 900 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9801 80th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 14630-14650 28th Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2920 Northwest Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5905 Trenton Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6055 Nathan Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1400 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1405 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1500 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1501 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1601 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1651 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2201-2215 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2250-2270 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2280-2300 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2301-2329 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3000 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3001-3037 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3012-3050 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 595 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 601 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 605 SW 16th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1920 West Baseline Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 301 Hill Carter Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4101-4127 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4201-4261 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4263-4299 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4263F-N. Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4301-4335 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4337-4379 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4401-4445 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4447-4491 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4501-4549 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4551-4593 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4601-4643 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4645-4683 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4717-4729 Eubank Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 510 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 520 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 530 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 540 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5600-5626 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5601-5659 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5650-5674 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5700 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5701-5799 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5900 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6000 Eastport Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6530 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6532 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 13098 George Weber Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 13220 Wilfred Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 13225 Brockton Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1070 Windham Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1550 Central Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1135 Aviation Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8715 Bollman Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8501 East Raintree Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1150 Gateway Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5555 12th Avenue East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5651 Innovation Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1210 Champion Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9300 Old Scotland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3990 Heritage Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3654-3668 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3701 Illinois Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3950-3980 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1501 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1527 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1551 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6900 Harbor View Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6920 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 6950 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1516 Fryar Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3401-3409 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3502 Roga Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3505 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 3608 Queen Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5250 Eagle Trail Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5501-5519 Pioneer Park Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5690-5694 Crenshaw Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8110 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8130 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9020 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9110 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9203 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9319 Peach Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9704 Solar Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 9945 Currie Davis Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1850 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1858 E Encanto Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 475 W Vaughn St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 921 South Park Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8313 West Pierce Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8591 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 8601 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5111 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5151 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1100 17th Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2100 M Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 400-500 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 600 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1400 Powis Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1 Kings Hill Aveune [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 42 Kings Hill Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | Liberty Square, Block 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | Liberty Square, Block 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | Liberty Square, Block 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | Liberty Square, Block 5 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 300 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2935 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2945 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 43-47 Hintz Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 800 Uline Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11020 Holly Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 333 Howard Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 120 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 130 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4485 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 10720 West Sam Houston Parkway North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 11250 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1200 Intrepid Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 351 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 4701 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5800 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 5800 Technology Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 1910 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Operating Properties [Member] | Minimum [Member] | 2040 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable life (years)	5 years
Development in Progress [Member] | 3225 Gravel Springs Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Buford, GA
Encumbrances				0
Initial Cost of Land				2,807,020
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,988,171
Land and Improvements				0
Building and Improvements				10,795,191
Gross Amount Carried at End of Period	$ 10,795,191			10,795,191
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 10,795,191
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 3525 Gravel Springs Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Buford, GA
Encumbrances				0
Initial Cost of Land				1,391,065
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,220,195
Land and Improvements				0
Building and Improvements				6,611,260
Gross Amount Carried at End of Period	$ 6,611,260			6,611,260
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,611,260
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 1951 TW Alexander Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Durham, NC
Encumbrances				0
Initial Cost of Land				1,115,595
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,139,353
Land and Improvements				0
Building and Improvements				4,254,948
Gross Amount Carried at End of Period	$ 4,254,948			4,254,948
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,254,948
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 1953 TW Alexander Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Durham, NC
Encumbrances				0
Initial Cost of Land				2,402,820
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,406,047
Land and Improvements				0
Building and Improvements				7,808,867
Gross Amount Carried at End of Period	$ 7,808,867			7,808,867
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,808,867
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 1075 King George Post Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Edison, NJ
Encumbrances				0
Initial Cost of Land				0
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				8,981,558
Land and Improvements				0
Building and Improvements				8,981,558
Gross Amount Carried at End of Period	$ 8,981,558			8,981,558
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,981,558
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 2988 Green Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Greer, SC
Encumbrances				0
Initial Cost of Land				2,271,948
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,767,991
Land and Improvements				0
Building and Improvements				6,039,939
Gross Amount Carried at End of Period	$ 6,039,939			6,039,939
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,039,939
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 4485 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	High Point, NC
Encumbrances				0
Initial Cost of Land				1,827,595
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				1,438,892
Land and Improvements				0
Building and Improvements				3,266,487
Gross Amount Carried at End of Period	$ 3,266,487			3,266,487
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,266,487
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 5430 FAA Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Irving, TX
Encumbrances				0
Initial Cost of Land				2,245,346
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				9,165,655
Land and Improvements				0
Building and Improvements				11,411,001
Gross Amount Carried at End of Period	$ 11,411,001			11,411,001
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,411,001
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 951 Valleyview Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Irving, TX
Encumbrances				0
Initial Cost of Land				3,899,824
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				13,094,727
Land and Improvements				0
Building and Improvements				16,994,551
Gross Amount Carried at End of Period	$ 16,994,551			16,994,551
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 16,994,551
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 1200 Claybrick Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Landover, MD
Encumbrances				0
Initial Cost of Land				6,876,500
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,297,654
Land and Improvements				0
Building and Improvements				14,174,154
Gross Amount Carried at End of Period	$ 14,174,154			14,174,154
Accumulated Depreciation
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 14,174,154
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation
Development in Progress [Member] | 1801 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	LaPorte, TX
Encumbrances				0
Initial Cost of Land				3,794,963
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				14,998,448
Land and Improvements				0
Building and Improvements				18,793,411
Gross Amount Carried at End of Period	$ 18,793,411			18,793,411
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 18,793,411
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 8801 Congdon Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Mertztown, PA
Encumbrances				0
Initial Cost of Land				23,016,646
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				10,368,794
Land and Improvements				0
Building and Improvements				33,385,440
Gross Amount Carried at End of Period	$ 33,385,440			33,385,440
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 33,385,440
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 11440 NW 122 Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Miami, FL
Encumbrances
Initial Cost of Land				5,636,564
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,868,985
Land and Improvements				0
Building and Improvements				13,505,549
Gross Amount Carried at End of Period	$ 13,505,549			13,505,549
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 13,505,549
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 1050 Constitution Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				1,969,501
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				14,545,658
Land and Improvements				0
Building and Improvements				16,515,159
Gross Amount Carried at End of Period	$ 16,515,159			16,515,159
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 16,515,159
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]
Location	Philadelphia, PA
Encumbrances				0
Initial Cost of Land				404,883
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				18,785,986
Land and Improvements				0
Building and Improvements				19,190,869
Gross Amount Carried at End of Period	$ 19,190,869			19,190,869
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 19,190,869
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 351 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Phoenix, AZ
Encumbrances
Initial Cost of Land				4,234,407
Initial Cost of Buildings
Costs Capitalized Subsequent to Acquisition				594,110
Land and Improvements				0
Building and Improvements				4,828,517
Gross Amount Carried at End of Period	$ 4,828,517			4,828,517
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,828,517
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 7205 W Buckeye Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Phoenix, AZ
Encumbrances
Initial Cost of Land				2,514,425
Initial Cost of Buildings
Costs Capitalized Subsequent to Acquisition				8,326,405
Land and Improvements				0
Building and Improvements				10,840,830
Gross Amount Carried at End of Period	$ 10,840,830			10,840,830
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 10,840,830
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 3929 Shutterfly Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Charlotte, NC
Encumbrances
Initial Cost of Land				592,233
Initial Cost of Buildings
Costs Capitalized Subsequent to Acquisition				1,407,692
Land and Improvements				0
Building and Improvements				1,999,925
Gross Amount Carried at End of Period	$ 1,999,925			1,999,925
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,999,925
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 1870 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tempe, AZ
Encumbrances
Initial Cost of Land				2,272,702
Initial Cost of Buildings
Costs Capitalized Subsequent to Acquisition				4,551,276
Land and Improvements				0
Building and Improvements				6,823,978
Gross Amount Carried at End of Period	$ 6,823,978			6,823,978
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,823,978
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 1930 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tempe, AZ
Encumbrances				0
Initial Cost of Land				4,069,890
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				17,940,732
Land and Improvements				0
Building and Improvements				22,010,622
Gross Amount Carried at End of Period	$ 22,010,622			22,010,622
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 22,010,622
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 2040 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Tempe, AZ
Encumbrances				0
Initial Cost of Land				535,698
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,025,217
Land and Improvements				0
Building and Improvements				2,560,915
Gross Amount Carried at End of Period	$ 2,560,915			2,560,915
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,560,915
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 6017 Southern Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Palm Beach, FL
Encumbrances				0
Initial Cost of Land				4,513,860
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,496,005
Land and Improvements				0
Building and Improvements				12,009,865
Gross Amount Carried at End of Period	$ 12,009,865			12,009,865
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,009,865
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | 6035 Southern Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	West Palm Beach, FL
Encumbrances				0
Initial Cost of Land				2,499,894
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,511,565
Land and Improvements				0
Building and Improvements				7,011,459
Gross Amount Carried at End of Period	$ 7,011,459			7,011,459
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,011,459
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Development in Progress [Member] | Worcester 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Worcester, UK
Encumbrances				0
Initial Cost of Land				843,256
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				842,633
Land and Improvements				0
Building and Improvements				1,685,889
Gross Amount Carried at End of Period	$ 1,685,889			1,685,889
Accumulated Depreciation
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,685,889
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation
Development in Progress [Member] | Worcester 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Worcester, UK
Encumbrances				0
Initial Cost of Land				3,172,249
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,777,190
Land and Improvements				0
Building and Improvements				5,949,439
Gross Amount Carried at End of Period	$ 5,949,439			5,949,439
Accumulated Depreciation
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,949,439
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation
Development in Progress [Member] | Total Development in Progress [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances				0
Initial Cost of Land				84,908,884
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				182,540,939
Land and Improvements				0
Building and Improvements				267,449,823
Gross Amount Carried at End of Period	267,449,823			267,449,823
Accumulated Depreciation	0			0
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	267,449,823
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]
Location	Arlington, TX
Encumbrances				0
Initial Cost of Land				4,754,659
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				974,353
Land and Improvements				5,729,011
Building and Improvements				0
Gross Amount Carried at End of Period	$ 5,729,011			5,729,011
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,729,011
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Land Held for Development [Member] | 350 N York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Bensenville, IL
Encumbrances
Initial Cost of Land				3,043,130
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				256,481
Land and Improvements				3,299,611
Building and Improvements				0
Gross Amount Carried at End of Period	$ 3,299,611			3,299,611
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,299,611
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]
Location	Bethlehem, PA
Encumbrances				0
Initial Cost of Land				17,719,400
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,023,124
Land and Improvements				22,742,524
Building and Improvements				0
Gross Amount Carried at End of Period	$ 22,742,524			22,742,524
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 22,742,524
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Land Held for Development [Member] | 180 Dulty's Lane Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Burlington, NJ
Encumbrances
Initial Cost of Land				2,866,850
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				14,876
Land and Improvements				2,881,726
Building and Improvements				0
Gross Amount Carried at End of Period	$ 2,881,726			2,881,726
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,881,726
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Land Held for Development [Member] | Camden Town Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Camden, NJ
Encumbrances
Initial Cost of Land				11,303,073
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,918,928
Land and Improvements				19,222,001
Building and Improvements				0
Gross Amount Carried at End of Period	$ 19,222,001			19,222,001
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 19,222,001
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]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				208,646
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				75,122
Land and Improvements				283,768
Building and Improvements				0
Gross Amount Carried at End of Period	$ 283,768			283,768
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 283,768
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]
Location	Charlotte, NC
Encumbrances				0
Initial Cost of Land				644,925
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				493,059
Land and Improvements				1,137,984
Building and Improvements				0
Gross Amount Carried at End of Period	$ 1,137,984			1,137,984
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,137,984
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Land Held for Development [Member] | Mountain Creek Business Park L [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Dallas, TX
Encumbrances
Initial Cost of Land				7,984,928
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				172,493
Land and Improvements				8,157,421
Building and Improvements				0
Gross Amount Carried at End of Period	$ 8,157,421			8,157,421
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,157,421
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]
Location	Dayton, MN
Encumbrances				0
Initial Cost of Land				889,205
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				192,208
Land and Improvements				1,081,413
Building and Improvements				0
Gross Amount Carried at End of Period	$ 1,081,413			1,081,413
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 1,081,413
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Land Held for Development [Member] | French Lake Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Dayton/Rogers, MN
Encumbrances				0
Initial Cost of Land				13,513,632
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,731,745
Land and Improvements				19,245,377
Building and Improvements				0
Gross Amount Carried at End of Period	$ 19,245,377			19,245,377
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 19,245,377
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]
Location	Durham, NC
Encumbrances				0
Initial Cost of Land				758,503
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				1,517,278
Land and Improvements				2,275,781
Building and Improvements				0
Gross Amount Carried at End of Period	$ 2,275,781			2,275,781
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,275,781
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]
Location	Eden Prairie, MN
Encumbrances				0
Initial Cost of Land				2,051,631
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				5,163,382
Land and Improvements				7,215,013
Building and Improvements				0
Gross Amount Carried at End of Period	$ 7,215,013			7,215,013
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,215,013
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]
Location	Goodyear, AZ
Encumbrances				0
Initial Cost of Land				16,857,556
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,251,564
Land and Improvements				21,109,120
Building and Improvements				0
Gross Amount Carried at End of Period	$ 21,109,120			21,109,120
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 21,109,120
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]
Location	Greensboro, NC
Encumbrances				0
Initial Cost of Land				564,535
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,936,254
Land and Improvements				3,500,789
Building and Improvements				0
Gross Amount Carried at End of Period	$ 3,500,789			3,500,789
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,500,789
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]
Location	Greer, SC
Encumbrances				0
Initial Cost of Land				16,338
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				43,899
Land and Improvements				60,237
Building and Improvements				0
Gross Amount Carried at End of Period	$ 60,237			60,237
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 60,237
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]
Location	Hanover, MD
Encumbrances				0
Initial Cost of Land				3,875,203
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				716,672
Land and Improvements				4,591,875
Building and Improvements				0
Gross Amount Carried at End of Period	$ 4,591,875			4,591,875
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,591,875
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]
Location	Hanover, MD
Encumbrances				0
Initial Cost of Land				3,371,183
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				(583,888)
Land and Improvements				2,787,295
Building and Improvements				0
Gross Amount Carried at End of Period	$ 2,787,295			2,787,295
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,787,295
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]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				5,160,668
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				27,267
Land and Improvements				5,187,935
Building and Improvements				0
Gross Amount Carried at End of Period	$ 5,187,935			5,187,935
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,187,935
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]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				5,756,865
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,891,085
Land and Improvements				9,647,950
Building and Improvements				0
Gross Amount Carried at End of Period	$ 9,647,950			9,647,950
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 9,647,950
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]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				26,135,466
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				7,533,750
Land and Improvements				33,669,216
Building and Improvements				0
Gross Amount Carried at End of Period	$ 33,669,216			33,669,216
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 33,669,216
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]
Location	Houston, TX
Encumbrances				0
Initial Cost of Land				4,611,474
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,317,825
Land and Improvements				6,929,299
Building and Improvements				0
Gross Amount Carried at End of Period	$ 6,929,299			6,929,299
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,929,299
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]
Location	Irving, TX
Encumbrances				0
Initial Cost of Land				1,917,440
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				668,084
Land and Improvements				2,585,524
Building and Improvements				0
Gross Amount Carried at End of Period	$ 2,585,524			2,585,524
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,585,524
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]
Location	Kent, UK
Encumbrances				0
Initial Cost of Land				0
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				11,145,627
Land and Improvements				11,145,627
Building and Improvements				0
Gross Amount Carried at End of Period	$ 11,145,627			11,145,627
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 11,145,627
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Land Held for Development [Member] | Port Crossing Commerce Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	La Porte, TX
Encumbrances				0
Initial Cost of Land				18,896,380
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,089,507
Land and Improvements				20,985,887
Building and Improvements				0
Gross Amount Carried at End of Period	$ 20,985,887			20,985,887
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 20,985,887
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]
Location	Logan, NJ
Encumbrances				0
Initial Cost of Land				792,118
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				1,436,192
Land and Improvements				2,228,310
Building and Improvements				0
Gross Amount Carried at End of Period	$ 2,228,310			2,228,310
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	1995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,228,310
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]
Location	Lower Macungie Twp, PA
Encumbrances				0
Initial Cost of Land				26,735,346
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				8,428,952
Land and Improvements				35,164,298
Building and Improvements				0
Gross Amount Carried at End of Period	$ 35,164,298			35,164,298
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 35,164,298
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]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				1,344,809
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				0
Land and Improvements				1,344,809
Building and Improvements				0
Gross Amount Carried at End of Period	$ 1,344,809			1,344,809
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	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] | 6 Great Valley Parkway Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				603,050
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,299,866
Land and Improvements				2,902,916
Building and Improvements				0
Gross Amount Carried at End of Period	$ 2,902,916			2,902,916
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 2,902,916
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Land Held for Development [Member] | Old Morehall Rd Land (Morelli) [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	Malvern, PA
Encumbrances
Initial Cost of Land				3,343,863
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				31,220
Land and Improvements				3,375,083
Building and Improvements				0
Gross Amount Carried at End of Period	$ 3,375,083			3,375,083
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,375,083
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]
Location	Malvern, PA
Encumbrances				0
Initial Cost of Land				675,499
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				297,170
Land and Improvements				972,669
Building and Improvements				0
Gross Amount Carried at End of Period	$ 972,669			972,669
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 972,669
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]
Location	Medley, FL
Encumbrances				0
Initial Cost of Land				10,811,686
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				15,276,884
Land and Improvements				26,088,570
Building and Improvements				0
Gross Amount Carried at End of Period	$ 26,088,570			26,088,570
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 26,088,570
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]
Location	Nazareth, PA
Encumbrances				0
Initial Cost of Land				4,667,646
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				490,247
Land and Improvements				5,157,893
Building and Improvements				0
Gross Amount Carried at End of Period	$ 5,157,893			5,157,893
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 5,157,893
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]
Location	Orlando, FL
Encumbrances				0
Initial Cost of Land				267,468
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				221,948
Land and Improvements				489,416
Building and Improvements				0
Gross Amount Carried at End of Period	$ 489,416			489,416
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 489,416
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]
Location	Palm Beach County, FL
Encumbrances				0
Initial Cost of Land				8,051,351
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				4,574,886
Land and Improvements				12,626,237
Building and Improvements				0
Gross Amount Carried at End of Period	$ 12,626,237			12,626,237
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 12,626,237
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]
Location	Phoenix, AZ
Encumbrances				0
Initial Cost of Land				6,173,841
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				1,405,210
Land and Improvements				7,579,051
Building and Improvements				0
Gross Amount Carried at End of Period	$ 7,579,051			7,579,051
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 7,579,051
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0
Land Held for Development [Member] | Redlands Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location	San Bernadino, CA
Encumbrances
Initial Cost of Land				4,040,825
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				420,399
Land and Improvements				4,461,224
Building and Improvements				0
Gross Amount Carried at End of Period	$ 4,461,224			4,461,224
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 4,461,224
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]
Location	Sandston, VA
Encumbrances				0
Initial Cost of Land				148,314
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				21,430
Land and Improvements				169,744
Building and Improvements				0
Gross Amount Carried at End of Period	$ 169,744			169,744
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	1996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 169,744
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]
Location	Scottsdale, AZ
Encumbrances				0
Initial Cost of Land				6,176,464
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				2,175,590
Land and Improvements				8,352,054
Building and Improvements				0
Gross Amount Carried at End of Period	$ 8,352,054			8,352,054
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 8,352,054
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]
Location	Suffolk, VA
Encumbrances				0
Initial Cost of Land				2,715,714
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				813,055
Land and Improvements				3,528,769
Building and Improvements				0
Gross Amount Carried at End of Period	$ 3,528,769			3,528,769
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 3,528,769
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]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				180,136
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				30,098
Land and Improvements				210,234
Building and Improvements				0
Gross Amount Carried at End of Period	$ 210,234			210,234
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 210,234
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]
Location	Tampa, FL
Encumbrances				0
Initial Cost of Land				3,289,423
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				3,155,681
Land and Improvements				6,445,104
Building and Improvements				0
Gross Amount Carried at End of Period	$ 6,445,104			6,445,104
Accumulated Depreciation	$ 0			0
Date of Construction or Acquisition	2006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	$ 6,445,104
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]
Encumbrances				0
Initial Cost of Land				232,919,243
Initial Cost of Buildings				0
Costs Capitalized Subsequent to Acquisition				103,649,523
Land and Improvements				336,568,765
Building and Improvements				0
Gross Amount Carried at End of Period	336,568,765			336,568,765
Accumulated Depreciation	0			$ 0
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross	336,568,765
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation	$ 0