Schedule III-Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Real Estate and Accumulated Depreciation
Encumbrances	$ 111,139
Initial Cost
Land	17,895
Bldg. & Improve.	15,438
Cost Capitalized Subsequent to Acquisition Improvements	225,728
Gross Amount at the end of the period
Land	17,895
Land improvements	27,592	$ 22,440
Bldg. & Bldg. Improvements	175,375
Tenant improvements	21,925	19,611
Construction in Progress	1,659
Development Costs	14,615
Total	259,061
Accumulated Depreciation	(86,801)	$ (80,784)	$ (74,762)	$ (61,078)
Industrial/Warehouse Building | Breinigsville, PA
Real Estate and Accumulated Depreciation
Encumbrances	3,606
Initial Cost
Land	832
Bldg. & Improve.	4,560
Gross Amount at the end of the period
Land	832
Land improvements	349
Bldg. & Bldg. Improvements	3,990
Tenant improvements	221
Total	5,392
Accumulated Depreciation	$ (1,184)
Depr. Life	40 years
Restaurant Building | Windsor, CT
Initial Cost
Land	$ 1
Cost Capitalized Subsequent to Acquisition Improvements	2,177
Gross Amount at the end of the period
Land	1
Land improvements	266
Bldg. & Bldg. Improvements	1,402
Tenant improvements	509
Total	2,178
Accumulated Depreciation	$ (1,597)
Depr. Life	40 years
Nursery Farm | Granby, CT
Initial Cost
Land	$ 417
Cost Capitalized Subsequent to Acquisition Improvements	11,052
Gross Amount at the end of the period
Land	417
Land improvements	1,565
Bldg. & Bldg. Improvements	9,487
Total	11,469
Accumulated Depreciation	$ (10,390)
Depr. Life	20 years
Nursery Farm | Quincy, FL
Initial Cost
Land	$ 279
Cost Capitalized Subsequent to Acquisition Improvements	8,697
Gross Amount at the end of the period
Land	279
Land improvements	4,089
Bldg. & Bldg. Improvements	4,608
Total	8,976
Accumulated Depreciation	$ (7,794)
Depr. Life	20 years
Residential Development | Simsbury, CT
Initial Cost
Land	$ 202
Cost Capitalized Subsequent to Acquisition Improvements	8,337
Gross Amount at the end of the period
Land	202
Development Costs	8,337
Total	8,539
Location 1 | Industrial/Warehouse Building | Bloomfield, CT
Initial Cost
Land	1
Cost Capitalized Subsequent to Acquisition Improvements	771
Gross Amount at the end of the period
Land	1
Land improvements	92
Bldg. & Bldg. Improvements	679
Total	772
Accumulated Depreciation	$ (602)
Depr. Life	40 years
Location 2 | Industrial/Warehouse Building | Bloomfield, CT
Initial Cost
Land	$ 251
Bldg. & Improve.	1,198
Cost Capitalized Subsequent to Acquisition Improvements	1,545
Gross Amount at the end of the period
Land	251
Land improvements	321
Bldg. & Bldg. Improvements	1,740
Tenant improvements	670
Construction in Progress	12
Total	2,994
Accumulated Depreciation	$ (382)
Depr. Life	40 years
Location 3 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 14,187
Initial Cost
Land	4
Bldg. & Improve.	1,722
Cost Capitalized Subsequent to Acquisition Improvements	914
Gross Amount at the end of the period
Land	4
Land improvements	774
Bldg. & Bldg. Improvements	1,835
Tenant improvements	27
Total	2,640
Accumulated Depreciation	$ (1,823)
Depr. Life	40 years
Location 4 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 4
Cost Capitalized Subsequent to Acquisition Improvements	1,732
Gross Amount at the end of the period
Land	4
Land improvements	212
Bldg. & Bldg. Improvements	1,411
Tenant improvements	109
Total	1,736
Accumulated Depreciation	$ (1,435)
Depr. Life	40 years
Location 5 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 4
Cost Capitalized Subsequent to Acquisition Improvements	2,945
Gross Amount at the end of the period
Land	4
Land improvements	310
Bldg. & Bldg. Improvements	2,224
Tenant improvements	411
Total	2,949
Accumulated Depreciation	$ (1,994)
Depr. Life	40 years
Location 6 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 10
Cost Capitalized Subsequent to Acquisition Improvements	4,433
Gross Amount at the end of the period
Land	10
Land improvements	356
Bldg. & Bldg. Improvements	3,650
Tenant improvements	394
Construction in Progress	33
Total	4,443
Accumulated Depreciation	$ (2,218)
Depr. Life	40 years
Location 7 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 13
Cost Capitalized Subsequent to Acquisition Improvements	7,565
Gross Amount at the end of the period
Land	13
Land improvements	525
Bldg. & Bldg. Improvements	5,676
Tenant improvements	1,364
Total	7,578
Accumulated Depreciation	$ (2,297)
Depr. Life	40 years
Location 8 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 4,905
Initial Cost
Land	12
Cost Capitalized Subsequent to Acquisition Improvements	8,220
Gross Amount at the end of the period
Land	12
Land improvements	363
Bldg. & Bldg. Improvements	5,145
Tenant improvements	2,712
Total	8,232
Accumulated Depreciation	$ (5,832)
Depr. Life	40 years
Location 9 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 7
Cost Capitalized Subsequent to Acquisition Improvements	3,174
Gross Amount at the end of the period
Land	7
Land improvements	20
Bldg. & Bldg. Improvements	3,051
Construction in Progress	103
Total	3,181
Accumulated Depreciation	$ (1,367)
Depr. Life	40 years
Location 10 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 17,624
Initial Cost
Land	13
Cost Capitalized Subsequent to Acquisition Improvements	5,650
Gross Amount at the end of the period
Land	13
Land improvements	35
Bldg. & Bldg. Improvements	5,044
Tenant improvements	571
Total	5,663
Accumulated Depreciation	$ (2,423)
Depr. Life	40 years
Location 11 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 16
Cost Capitalized Subsequent to Acquisition Improvements	7,605
Gross Amount at the end of the period
Land	16
Land improvements	80
Bldg. & Bldg. Improvements	6,903
Tenant improvements	622
Total	7,621
Accumulated Depreciation	$ (3,021)
Depr. Life	40 years
Location 12 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 15
Cost Capitalized Subsequent to Acquisition Improvements	17,203
Gross Amount at the end of the period
Land	15
Land improvements	154
Bldg. & Bldg. Improvements	13,876
Tenant improvements	3,173
Total	17,218
Accumulated Depreciation	$ (3,732)
Depr. Life	40 years
Location 13 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 10,313
Initial Cost
Land	57
Cost Capitalized Subsequent to Acquisition Improvements	16,014
Gross Amount at the end of the period
Land	57
Land improvements	1,031
Bldg. & Bldg. Improvements	13,886
Tenant improvements	1,097
Total	16,071
Accumulated Depreciation	$ (3,815)
Depr. Life	40 years
Location 14 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 20
Cost Capitalized Subsequent to Acquisition Improvements	8,543
Gross Amount at the end of the period
Land	20
Land improvements	564
Bldg. & Bldg. Improvements	7,559
Tenant improvements	420
Total	8,563
Accumulated Depreciation	$ (2,341)
Depr. Life	40 years
Location 15 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 12
Cost Capitalized Subsequent to Acquisition Improvements	6,928
Gross Amount at the end of the period
Land	12
Land improvements	448
Bldg. & Bldg. Improvements	6,263
Tenant improvements	217
Total	6,940
Accumulated Depreciation	$ (2,151)
Depr. Life	40 years
Location 16 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 7,001
Initial Cost
Land	19
Cost Capitalized Subsequent to Acquisition Improvements	8,229
Gross Amount at the end of the period
Land	19
Land improvements	164
Bldg. & Bldg. Improvements	8,065
Total	8,248
Accumulated Depreciation	$ (3,264)
Depr. Life	40 years
Location 17 | Industrial/Warehouse Building | Lower Nazareth Township, PA.
Real Estate and Accumulated Depreciation
Encumbrances	$ 20,744
Initial Cost
Land	1,351
Cost Capitalized Subsequent to Acquisition Improvements	15,490
Gross Amount at the end of the period
Land	1,351
Land improvements	1,366
Bldg. & Bldg. Improvements	12,874
Tenant improvements	1,250
Total	16,841
Accumulated Depreciation	$ (1,375)
Depr. Life	40 years
Location 18 | Industrial/Warehouse Building | Lower Nazareth Township, PA.
Initial Cost
Land	$ 721
Cost Capitalized Subsequent to Acquisition Improvements	11,138
Gross Amount at the end of the period
Land	721
Land improvements	1,359
Bldg. & Bldg. Improvements	8,958
Tenant improvements	821
Total	11,859
Accumulated Depreciation	$ (1,942)
Depr. Life	40 years
Location 19 | Industrial/Warehouse Building | Hanover Township, PA.
Real Estate and Accumulated Depreciation
Encumbrances	$ 26,725
Initial Cost
Land	4,022
Cost Capitalized Subsequent to Acquisition Improvements	16,246
Gross Amount at the end of the period
Land	4,022
Land improvements	3,956
Bldg. & Bldg. Improvements	11,076
Tenant improvements	1,214
Total	20,268
Accumulated Depreciation	$ (907)
Depr. Life	40 years
Location 20 | Industrial/Warehouse Building | Hanover Township, PA.
Initial Cost
Land	$ 3,620
Cost Capitalized Subsequent to Acquisition Improvements	13,073
Gross Amount at the end of the period
Land	3,620
Land improvements	4,433
Bldg. & Bldg. Improvements	7,865
Construction in Progress	775
Total	16,693
Accumulated Depreciation	$ (187)
Depr. Life	40 years
Location 21 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 5
Cost Capitalized Subsequent to Acquisition Improvements	4,188
Gross Amount at the end of the period
Land	5
Land improvements	578
Bldg. & Bldg. Improvements	2,940
Tenant improvements	670
Total	4,193
Accumulated Depreciation	$ (3,561)
Depr. Life	40 years
Location 22 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 4
Cost Capitalized Subsequent to Acquisition Improvements	2,777
Gross Amount at the end of the period
Land	4
Land improvements	269
Bldg. & Bldg. Improvements	1,962
Tenant improvements	546
Total	2,781
Accumulated Depreciation	$ (2,263)
Depr. Life	40 years
Location 23 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 2
Cost Capitalized Subsequent to Acquisition Improvements	2,309
Gross Amount at the end of the period
Land	2
Land improvements	384
Bldg. & Bldg. Improvements	1,700
Tenant improvements	225
Total	2,311
Accumulated Depreciation	$ (1,510)
Depr. Life	40 years
Location 24 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 2
Cost Capitalized Subsequent to Acquisition Improvements	1,553
Gross Amount at the end of the period
Land	2
Land improvements	195
Bldg. & Bldg. Improvements	1,358
Total	1,555
Accumulated Depreciation	$ (1,103)
Depr. Life	40 years
Location 25 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 3
Cost Capitalized Subsequent to Acquisition Improvements	1,743
Gross Amount at the end of the period
Land	3
Land improvements	140
Bldg. & Bldg. Improvements	1,354
Tenant improvements	249
Total	1,746
Accumulated Depreciation	$ (1,021)
Depr. Life	40 years
Location 26 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 3
Cost Capitalized Subsequent to Acquisition Improvements	1,540
Gross Amount at the end of the period
Land	3
Land improvements	62
Bldg. & Bldg. Improvements	1,347
Tenant improvements	131
Total	1,543
Accumulated Depreciation	$ (1,005)
Depr. Life	40 years
Location 27 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 3
Cost Capitalized Subsequent to Acquisition Improvements	847
Gross Amount at the end of the period
Land	3
Land improvements	65
Bldg. & Bldg. Improvements	667
Tenant improvements	115
Total	850
Accumulated Depreciation	$ (579)
Depr. Life	40 years
Location 28 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 9
Cost Capitalized Subsequent to Acquisition Improvements	4,551
Gross Amount at the end of the period
Land	9
Land improvements	28
Bldg. & Bldg. Improvements	3,677
Tenant improvements	846
Total	4,560
Accumulated Depreciation	$ (1,600)
Depr. Life	40 years
Location 29 | Office Flex Building | Windsor, CT
Initial Cost
Land	$ 17
Cost Capitalized Subsequent to Acquisition Improvements	6,022
Gross Amount at the end of the period
Land	17
Land improvements	434
Bldg. & Bldg. Improvements	4,440
Tenant improvements	1,148
Total	6,039
Accumulated Depreciation	$ (2,892)
Depr. Life	40 years
Location 30 | Office Flex Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 6,034
Initial Cost
Land	616
Bldg. & Improve.	3,954
Cost Capitalized Subsequent to Acquisition Improvements	2,682
Gross Amount at the end of the period
Land	616
Land improvements	375
Bldg. & Bldg. Improvements	4,558
Tenant improvements	967
Construction in Progress	736
Total	7,252
Accumulated Depreciation	$ (2,643)
Depr. Life	40 years
Location 31 | Office Flex Building | Windsor, CT
Initial Cost
Land	$ 577
Bldg. & Improve.	4,004
Cost Capitalized Subsequent to Acquisition Improvements	1,708
Gross Amount at the end of the period
Land	577
Land improvements	381
Bldg. & Bldg. Improvements	4,105
Tenant improvements	1,226
Total	6,289
Accumulated Depreciation	$ (3,116)
Depr. Life	40 years
New England Tradeport [Member] | Undeveloped Land
Initial Cost
Land	$ 981
Cost Capitalized Subsequent to Acquisition Improvements	3,499
Gross Amount at the end of the period
Land	981
Land improvements	71
Development Costs	3,428
Total	4,480
Accumulated Depreciation	(40)
Griffin Center/Griffin Center South | Undeveloped Land
Initial Cost
Land	435
Cost Capitalized Subsequent to Acquisition Improvements	1,459
Gross Amount at the end of the period
Land	435
Land improvements	470
Development Costs	989
Total	1,894
Accumulated Depreciation	(458)
Phoenix Crossing [Member] | Undeveloped Land
Initial Cost
Land	1,117
Cost Capitalized Subsequent to Acquisition Improvements	1,344
Gross Amount at the end of the period
Land	1,117
Development Costs	1,344
Total	2,461
Other | Undeveloped Land
Initial Cost
Land	2,218
Cost Capitalized Subsequent to Acquisition Improvements	1,825
Gross Amount at the end of the period
Land	2,218
Land improvements	1,308
Development Costs	517
Total	4,043
Accumulated Depreciation	$ (937)