Schedule III-Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
Real Estate and Accumulated Depreciation
Encumbrances	$ 90,436
Initial Cost
Land	18,157
Bldg. & Improve.	15,438
Cost Capitalized Subsequent to Acquisition Improvements	213,644
Gross Amount at the end of the period
Land	18,157
Land Improvements	22,440
Bldg. & Bldg. Improvements	160,921
Tenant Improvements	19,611
Construction in Progress	10,240
Development Costs	15,870
Total	247,239	$ 209,284
Accumulated Depreciation	(80,784)	$ (74,762)	$ (61,078)	$ (56,744)
Webster Credit Line
Gross Amount at the end of the period
Maximum borrowing capacity	12,500
Undeveloped Land
Initial Cost
Land	3,076
Cost Capitalized Subsequent to Acquisition Improvements	4,976
Gross Amount at the end of the period
Land	3,076
Land Improvements	1,849
Development Costs	3,127
Total	8,052
Accumulated Depreciation	(1,395)
New England Tradeport, Windsor/E. Granby, CT | Undeveloped portion
Initial Cost
Land	982
Cost Capitalized Subsequent to Acquisition Improvements	3,428
Gross Amount at the end of the period
Land	982
Development Costs	3,428
Total	4,410
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 1
Real Estate and Accumulated Depreciation
Encumbrances	7,501
Initial Cost
Land	8
Cost Capitalized Subsequent to Acquisition Improvements	4,357
Gross Amount at the end of the period
Land	8
Land Improvements	509
Bldg. & Bldg. Improvements	3,495
Tenant Improvements	347
Construction in Progress	6
Total	4,365
Accumulated Depreciation	$ (3,266)
Depr. Life	40 years
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 2
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	$ (1,765)
Depr. Life	40 years
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 3
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	$ (2,052)
Depr. Life	40 years
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 4
Initial Cost
Land	$ 10
Cost Capitalized Subsequent to Acquisition Improvements	4,392
Gross Amount at the end of the period
Land	10
Land Improvements	348
Bldg. & Bldg. Improvements	3,650
Tenant Improvements	394
Total	4,402
Accumulated Depreciation	$ (2,064)
Depr. Life	40 years
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 5
Real Estate and Accumulated Depreciation
Encumbrances	$ 6,226
Initial Cost
Land	12
Cost Capitalized Subsequent to Acquisition Improvements	8,213
Gross Amount at the end of the period
Land	12
Land Improvements	356
Bldg. & Bldg. Improvements	5,145
Tenant Improvements	2,712
Total	8,225
Accumulated Depreciation	$ (5,629)
Depr. Life	40 years
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 6
Initial Cost
Land	$ 7
Cost Capitalized Subsequent to Acquisition Improvements	3,313
Gross Amount at the end of the period
Land	7
Land Improvements	11
Bldg. & Bldg. Improvements	3,051
Tenant Improvements	251
Total	3,320
Accumulated Depreciation	$ (1,523)
Depr. Life	40 years
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 7
Real Estate and Accumulated Depreciation
Encumbrances	$ 17,926
Initial Cost
Land	13
Cost Capitalized Subsequent to Acquisition Improvements	5,610
Gross Amount at the end of the period
Land	13
Land Improvements	22
Bldg. & Bldg. Improvements	5,021
Tenant Improvements	563
Construction in Progress	4
Total	5,623
Accumulated Depreciation	$ (2,265)
Depr. Life	40 years
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 8
Initial Cost
Land	$ 16
Cost Capitalized Subsequent to Acquisition Improvements	7,584
Gross Amount at the end of the period
Land	16
Land Improvements	1
Bldg. & Bldg. Improvements	6,903
Tenant Improvements	622
Construction in Progress	58
Total	7,600
Accumulated Depreciation	$ (2,804)
Depr. Life	40 years
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 9
Initial Cost
Land	$ 15
Cost Capitalized Subsequent to Acquisition Improvements	16,866
Gross Amount at the end of the period
Land	15
Land Improvements	76
Bldg. & Bldg. Improvements	8,700
Tenant Improvements	1,622
Construction in Progress	6,468
Total	16,881
Accumulated Depreciation	$ (2,855)
Depr. Life	40 years
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 10
Real Estate and Accumulated Depreciation
Encumbrances	$ 10,610
Initial Cost
Land	57
Cost Capitalized Subsequent to Acquisition Improvements	15,999
Gross Amount at the end of the period
Land	57
Land Improvements	1,028
Bldg. & Bldg. Improvements	13,874
Tenant Improvements	1,097
Total	16,056
Accumulated Depreciation	$ (3,293)
Depr. Life	40 years
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 11
Initial Cost
Land	$ 20
Cost Capitalized Subsequent to Acquisition Improvements	8,374
Gross Amount at the end of the period
Land	20
Land Improvements	563
Bldg. & Bldg. Improvements	7,538
Tenant Improvements	273
Total	8,394
Accumulated Depreciation	$ (2,085)
Depr. Life	40 years
New England Tradeport, Windsor/E. Granby, CT | Industrial Building(s) | Location 12
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	$ (1,945)
Depr. Life	40 years
Griffin Center, Windsor, CT | Undeveloped portion
Initial Cost
Land	$ 148
Cost Capitalized Subsequent to Acquisition Improvements	604
Gross Amount at the end of the period
Land	148
Development Costs	604
Total	752
Griffin Center, Windsor, CT | Industrial Building(s) | Location 13
Real Estate and Accumulated Depreciation
Encumbrances	7,385
Initial Cost
Land	19
Cost Capitalized Subsequent to Acquisition Improvements	8,214
Gross Amount at the end of the period
Land	19
Land Improvements	149
Bldg. & Bldg. Improvements	8,065
Total	8,233
Accumulated Depreciation	$ (3,053)
Depr. Life	40 years
Griffin Center, Windsor, CT | Restaurant Building | Location 14
Initial Cost
Land	$ 1
Cost Capitalized Subsequent to Acquisition Improvements	2,175
Gross Amount at the end of the period
Land	1
Land Improvements	264
Bldg. & Bldg. Improvements	1,402
Tenant Improvements	509
Total	2,176
Accumulated Depreciation	$ (1,497)
Depr. Life	40 years
Griffin Center, Windsor, CT | Office building(s) | Location 15
Initial Cost
Land	$ 17
Cost Capitalized Subsequent to Acquisition Improvements	5,881
Gross Amount at the end of the period
Land	17
Land Improvements	420
Bldg. & Bldg. Improvements	4,266
Tenant Improvements	1,195
Total	5,898
Accumulated Depreciation	$ (2,960)
Depr. Life	40 years
Griffin Center, Windsor, CT | Office building(s) | Location 16
Real Estate and Accumulated Depreciation
Encumbrances	$ 6,217
Initial Cost
Land	1,193
Bldg. & Improve.	7,958
Cost Capitalized Subsequent to Acquisition Improvements	3,812
Gross Amount at the end of the period
Land	1,193
Land Improvements	740
Bldg. & Bldg. Improvements	8,478
Tenant Improvements	2,552
Total	12,963
Accumulated Depreciation	$ (5,616)
Depr. Life	40 years
Griffin Center South, Bloomfield, CT | Undeveloped portion
Initial Cost
Land	$ 312
Cost Capitalized Subsequent to Acquisition Improvements	374
Gross Amount at the end of the period
Land	312
Development Costs	374
Total	686
Griffin Center South, Bloomfield, CT | Industrial Building(s) | Location 21
Initial Cost
Land	1
Cost Capitalized Subsequent to Acquisition Improvements	765
Gross Amount at the end of the period
Land	1
Land Improvements	86
Bldg. & Bldg. Improvements	679
Total	766
Accumulated Depreciation	$ (587)
Depr. Life	40 years
Griffin Center South, Bloomfield, CT | Office building(s) | Location 17
Initial Cost
Land	$ 5
Cost Capitalized Subsequent to Acquisition Improvements	4,135
Gross Amount at the end of the period
Land	5
Land Improvements	576
Bldg. & Bldg. Improvements	2,887
Tenant Improvements	587
Construction in Progress	85
Total	4,140
Accumulated Depreciation	$ (3,432)
Depr. Life	40 years
Griffin Center South, Bloomfield, CT | Office building(s) | Location 18
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	$ (2,091)
Depr. Life	40 years
Griffin Center South, Bloomfield, CT | Office building(s) | Location 19
Initial Cost
Land	$ 2
Cost Capitalized Subsequent to Acquisition Improvements	2,226
Gross Amount at the end of the period
Land	2
Land Improvements	384
Bldg. & Bldg. Improvements	1,518
Tenant Improvements	225
Construction in Progress	99
Total	2,228
Accumulated Depreciation	$ (1,423)
Depr. Life	40 years
Griffin Center South, Bloomfield, CT | Office building(s) | Location 20
Initial Cost
Land	$ 2
Cost Capitalized Subsequent to Acquisition Improvements	1,534
Gross Amount at the end of the period
Land	2
Land Improvements	189
Bldg. & Bldg. Improvements	1,345
Total	1,536
Accumulated Depreciation	$ (1,067)
Depr. Life	40 years
Griffin Center South, Bloomfield, CT | Office building(s) | Location 22
Initial Cost
Land	$ 9
Cost Capitalized Subsequent to Acquisition Improvements	4,129
Gross Amount at the end of the period
Land	9
Land Improvements	266
Bldg. & Bldg. Improvements	3,367
Tenant Improvements	496
Total	4,138
Accumulated Depreciation	$ (2,452)
Depr. Life	40 years
Griffin Center South, Bloomfield, CT | Office building(s) | Location 23
Initial Cost
Land	$ 9
Cost Capitalized Subsequent to Acquisition Improvements	4,553
Gross Amount at the end of the period
Land	9
Land Improvements	30
Bldg. & Bldg. Improvements	3,677
Tenant Improvements	846
Total	4,562
Accumulated Depreciation	$ (1,376)
Depr. Life	40 years
Bloomfield, CT | Industrial Building(s) | Location 24
Initial Cost
Land	$ 746
Bldg. & Improve.	1,198
Gross Amount at the end of the period
Land	746
Land Improvements	72
Bldg. & Bldg. Improvements	1,126
Total	1,944
Accumulated Depreciation	$ (318)
Depr. Life	40 years
Breinigsville, PA | Industrial Building(s) | Location 25
Real Estate and Accumulated Depreciation
Encumbrances	$ 3,729
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	$ (1,013)
Depr. Life	40 years
Lower Nazareth Township, PA. | Industrial Building(s) | Location 26
Real Estate and Accumulated Depreciation
Encumbrances	$ 19,385
Initial Cost
Land	1,351
Cost Capitalized Subsequent to Acquisition Improvements	14,965
Gross Amount at the end of the period
Land	1,351
Land Improvements	1,355
Bldg. & Bldg. Improvements	12,467
Tenant Improvements	981
Construction in Progress	162
Total	16,316
Accumulated Depreciation	$ (722)
Depr. Life	40 years
Lower Nazareth Township, PA. | Industrial Building(s) | Location 27
Initial Cost
Land	$ 721
Cost Capitalized Subsequent to Acquisition Improvements	11,176
Gross Amount at the end of the period
Land	721
Land Improvements	1,359
Bldg. & Bldg. Improvements	8,996
Tenant Improvements	821
Total	11,897
Accumulated Depreciation	$ (1,437)
Depr. Life	40 years
Hanover Township, PA. | Industrial Building under construction
Initial Cost
Land	$ 3,620
Cost Capitalized Subsequent to Acquisition Improvements	3,358
Gross Amount at the end of the period
Land	3,620
Construction in Progress	3,358
Total	6,978
Hanover Township, PA. | Industrial Building(s)
Real Estate and Accumulated Depreciation
Encumbrances	11,457
Initial Cost
Land	4,022
Cost Capitalized Subsequent to Acquisition Improvements	15,573
Gross Amount at the end of the period
Land	4,022
Land Improvements	3,768
Bldg. & Bldg. Improvements	10,662
Tenant Improvements	1,143
Total	19,595
Accumulated Depreciation	(183)
Granby, CT | Nursery Farm
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	$ (10,214)
Depr. Life	20 years
Quincy, FL | Nursery Farm
Initial Cost
Land	$ 279
Cost Capitalized Subsequent to Acquisition Improvements	9,485
Gross Amount at the end of the period
Land	279
Land Improvements	4,089
Bldg. & Bldg. Improvements	5,396
Total	9,764
Accumulated Depreciation	$ (8,402)
Depr. Life	20 years
Simsbury, CT | Residential Development
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