Schedule III-Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015
Real Estate and Accumulated Depreciation
Encumbrances	$ 147,161
Initial Cost
Land	23,396
Bldg. & Improve.	30,666
Cost Capitalized Subsequent to Acquisition Improvements	265,998
Gross Amount at the end of the period
Land	21,961
Land improvements	38,280	$ 30,833
Bldg. & Bldg. Improvements	215,216
Tenant improvements	29,163	27,924
Construction in Progress	562
Development Costs	13,443
Total	318,625
Accumulated Depreciation	(105,004)	$ (95,112)	$ (86,801)	$ (80,784)
Industrial/Warehouse Building | Breinigsville, PA
Real Estate and Accumulated Depreciation
Encumbrances	3,345
Initial Cost
Land	832
Bldg. & Improve.	4,599
Gross Amount at the end of the period
Land	832
Land improvements	349
Bldg. & Bldg. Improvements	4,029
Tenant improvements	221
Total	5,431
Accumulated Depreciation	$ (1,535)
Depr. Life	40 years
Industrial/Warehouse Building | Concord, NH
Real Estate and Accumulated Depreciation
Encumbrances	$ 11,898
Initial Cost
Land	1,600
Bldg. & Improve.	15,189
Cost Capitalized Subsequent to Acquisition Improvements	320
Gross Amount at the end of the period
Land	1,600
Land improvements	1,593
Bldg. & Bldg. Improvements	13,042
Tenant improvements	874
Total	17,109
Accumulated Depreciation	$ (946)
Depr. Life	40 years
Restaurant Building | Windsor, CT
Initial Cost
Land	$ 1
Cost Capitalized Subsequent to Acquisition Improvements	2,195
Gross Amount at the end of the period
Land	1
Land improvements	265
Bldg. & Bldg. Improvements	1,413
Tenant improvements	508
Construction in Progress	9
Total	2,196
Accumulated Depreciation	$ (1,779)
Depr. Life	40 years
Nursery Farm | Granby, CT
Initial Cost
Land	$ 392
Cost Capitalized Subsequent to Acquisition Improvements	10,988
Gross Amount at the end of the period
Land	392
Land improvements	1,565
Bldg. & Bldg. Improvements	9,423
Total	11,380
Accumulated Depreciation	$ (10,590)
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	$ (8,143)
Depr. Life	20 years
Residential Development | Simsbury, CT
Initial Cost
Land	$ 201
Cost Capitalized Subsequent to Acquisition Improvements	8,337
Gross Amount at the end of the period
Land	201
Development Costs	8,337
Total	8,538
Location 1 | Industrial/Warehouse Building | Bloomfield, CT
Initial Cost
Land	1
Cost Capitalized Subsequent to Acquisition Improvements	861
Gross Amount at the end of the period
Land	1
Land improvements	92
Bldg. & Bldg. Improvements	769
Total	862
Accumulated Depreciation	$ (633)
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	1,593
Gross Amount at the end of the period
Land	251
Land improvements	321
Bldg. & Bldg. Improvements	1,752
Tenant improvements	718
Total	3,042
Accumulated Depreciation	$ (706)
Depr. Life	40 years
Location 3 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 13,487
Initial Cost
Land	4
Bldg. & Improve.	1,722
Cost Capitalized Subsequent to Acquisition Improvements	922
Gross Amount at the end of the period
Land	4
Land improvements	774
Bldg. & Bldg. Improvements	1,843
Tenant improvements	27
Total	2,648
Accumulated Depreciation	$ (1,939)
Depr. Life	40 years
Location 4 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 4
Cost Capitalized Subsequent to Acquisition Improvements	1,973
Gross Amount at the end of the period
Land	4
Land improvements	212
Bldg. & Bldg. Improvements	1,578
Tenant improvements	153
Construction in Progress	30
Total	1,977
Accumulated Depreciation	$ (1,488)
Depr. Life	40 years
Location 5 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 4
Cost Capitalized Subsequent to Acquisition Improvements	3,178
Gross Amount at the end of the period
Land	4
Land improvements	310
Bldg. & Bldg. Improvements	2,333
Tenant improvements	535
Total	3,182
Accumulated Depreciation	$ (2,277)
Depr. Life	40 years
Location 6 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 259
Cost Capitalized Subsequent to Acquisition Improvements	4,477
Gross Amount at the end of the period
Land	259
Land improvements	356
Bldg. & Bldg. Improvements	3,650
Tenant improvements	394
Construction in Progress	77
Total	4,736
Accumulated Depreciation	$ (2,518)
Depr. Life	40 years
Location 7 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 13
Cost Capitalized Subsequent to Acquisition Improvements	7,531
Gross Amount at the end of the period
Land	13
Land improvements	525
Bldg. & Bldg. Improvements	5,642
Tenant improvements	1,364
Total	7,544
Accumulated Depreciation	$ (2,782)
Depr. Life	40 years
Location 8 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 4,324
Initial Cost
Land	12
Cost Capitalized Subsequent to Acquisition Improvements	8,243
Gross Amount at the end of the period
Land	12
Land improvements	363
Bldg. & Bldg. Improvements	5,168
Tenant improvements	2,712
Total	8,255
Accumulated Depreciation	$ (6,213)
Depr. Life	40 years
Location 9 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 7
Cost Capitalized Subsequent to Acquisition Improvements	3,381
Gross Amount at the end of the period
Land	7
Land improvements	20
Bldg. & Bldg. Improvements	3,175
Tenant improvements	186
Total	3,388
Accumulated Depreciation	$ (1,626)
Depr. Life	40 years
Location 10 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 16,978
Initial Cost
Land	13
Cost Capitalized Subsequent to Acquisition Improvements	5,784
Gross Amount at the end of the period
Land	13
Land improvements	62
Bldg. & Bldg. Improvements	5,079
Tenant improvements	643
Total	5,797
Accumulated Depreciation	$ (2,761)
Depr. Life	40 years
Location 11 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 16
Cost Capitalized Subsequent to Acquisition Improvements	7,611
Gross Amount at the end of the period
Land	16
Land improvements	86
Bldg. & Bldg. Improvements	6,903
Tenant improvements	622
Total	7,627
Accumulated Depreciation	$ (3,451)
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	$ (5,477)
Depr. Life	40 years
Location 13 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 10,284
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	$ (4,746)
Depr. Life	40 years
Location 14 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 18,482
Initial Cost
Land	20
Cost Capitalized Subsequent to Acquisition Improvements	10,153
Gross Amount at the end of the period
Land	20
Land improvements	703
Bldg. & Bldg. Improvements	8,167
Tenant improvements	1,283
Total	10,173
Accumulated Depreciation	$ (3,068)
Depr. Life	40 years
Location 15 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 12
Cost Capitalized Subsequent to Acquisition Improvements	6,969
Gross Amount at the end of the period
Land	12
Land improvements	464
Bldg. & Bldg. Improvements	6,288
Tenant improvements	217
Total	6,981
Accumulated Depreciation	$ (2,528)
Depr. Life	40 years
Location 16 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 6,172
Initial Cost
Land	19
Cost Capitalized Subsequent to Acquisition Improvements	8,236
Gross Amount at the end of the period
Land	19
Land improvements	171
Bldg. & Bldg. Improvements	8,065
Total	8,255
Accumulated Depreciation	$ (3,690)
Depr. Life	40 years
Location 17 | Industrial/Warehouse Building | Lower Nazareth Township, PA.
Real Estate and Accumulated Depreciation
Encumbrances	$ 19,674
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	$ (2,781)
Depr. Life	40 years
Location 18 | Industrial/Warehouse Building | Lower Nazareth Township, PA.
Initial Cost
Land	$ 721
Cost Capitalized Subsequent to Acquisition Improvements	11,158
Gross Amount at the end of the period
Land	721
Land improvements	1,369
Bldg. & Bldg. Improvements	8,968
Tenant improvements	821
Total	11,879
Accumulated Depreciation	$ (2,891)
Depr. Life	40 years
Location 19 | Industrial/Warehouse Building | Hanover Township, PA.
Initial Cost
Land	$ 4,022
Cost Capitalized Subsequent to Acquisition Improvements	16,298
Gross Amount at the end of the period
Land	4,022
Land improvements	4,008
Bldg. & Bldg. Improvements	11,076
Tenant improvements	1,214
Total	20,320
Accumulated Depreciation	$ (2,434)
Depr. Life	40 years
Location 20 | Industrial/Warehouse Building | Hanover Township, PA.
Real Estate and Accumulated Depreciation
Encumbrances	$ 25,402
Initial Cost
Land	3,620
Cost Capitalized Subsequent to Acquisition Improvements	15,574
Gross Amount at the end of the period
Land	3,620
Land improvements	4,500
Bldg. & Bldg. Improvements	9,134
Tenant improvements	1,940
Total	19,194
Accumulated Depreciation	$ (1,642)
Depr. Life	40 years
Location 21 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 5
Cost Capitalized Subsequent to Acquisition Improvements	4,317
Gross Amount at the end of the period
Land	5
Land improvements	594
Bldg. & Bldg. Improvements	2,973
Tenant improvements	750
Total	4,322
Accumulated Depreciation	$ (3,672)
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	$ (2,378)
Depr. Life	40 years
Location 23 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 2
Cost Capitalized Subsequent to Acquisition Improvements	2,333
Gross Amount at the end of the period
Land	2
Land improvements	384
Bldg. & Bldg. Improvements	1,724
Tenant improvements	225
Total	2,335
Accumulated Depreciation	$ (1,691)
Depr. Life	40 years
Location 24 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 2
Cost Capitalized Subsequent to Acquisition Improvements	3,212
Gross Amount at the end of the period
Land	2
Land improvements	214
Bldg. & Bldg. Improvements	2,301
Tenant improvements	697
Total	3,214
Accumulated Depreciation	$ (1,286)
Depr. Life	40 years
Location 25 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 3
Cost Capitalized Subsequent to Acquisition Improvements	1,746
Gross Amount at the end of the period
Land	3
Land improvements	140
Bldg. & Bldg. Improvements	1,357
Tenant improvements	249
Total	1,749
Accumulated Depreciation	$ (1,166)
Depr. Life	40 years
Location 26 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 3
Cost Capitalized Subsequent to Acquisition Improvements	1,825
Gross Amount at the end of the period
Land	3
Land improvements	85
Bldg. & Bldg. Improvements	1,525
Tenant improvements	215
Total	1,828
Accumulated Depreciation	$ (979)
Depr. Life	40 years
Location 27 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 3
Cost Capitalized Subsequent to Acquisition Improvements	871
Gross Amount at the end of the period
Land	3
Land improvements	89
Bldg. & Bldg. Improvements	667
Tenant improvements	115
Total	874
Accumulated Depreciation	$ (644)
Depr. Life	40 years
Location 28 | Office Flex Building | Bloomfield, CT
Initial Cost
Land	$ 9
Cost Capitalized Subsequent to Acquisition Improvements	4,564
Gross Amount at the end of the period
Land	9
Land improvements	28
Bldg. & Bldg. Improvements	3,690
Tenant improvements	846
Total	4,573
Accumulated Depreciation	$ (2,044)
Depr. Life	40 years
Location 29 | Office Flex Building | Windsor, CT
Initial Cost
Land	$ 17
Cost Capitalized Subsequent to Acquisition Improvements	6,114
Gross Amount at the end of the period
Land	17
Land improvements	434
Bldg. & Bldg. Improvements	4,532
Tenant improvements	1,148
Total	6,131
Accumulated Depreciation	$ (3,378)
Depr. Life	40 years
Location 30 | Office Flex Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 4,273
Initial Cost
Land	616
Bldg. & Improve.	3,954
Cost Capitalized Subsequent to Acquisition Improvements	2,804
Gross Amount at the end of the period
Land	616
Land improvements	378
Bldg. & Bldg. Improvements	4,860
Tenant improvements	1,520
Total	7,374
Accumulated Depreciation	$ (3,472)
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	1,770
Gross Amount at the end of the period
Land	577
Land improvements	383
Bldg. & Bldg. Improvements	4,150
Tenant improvements	1,226
Construction in Progress	15
Total	6,351
Accumulated Depreciation	$ (3,478)
Depr. Life	40 years
Location 32 | Industrial/Warehouse Building | Windsor, CT
Initial Cost
Land	$ 16
Cost Capitalized Subsequent to Acquisition Improvements	9,602
Gross Amount at the end of the period
Land	16
Land improvements	2,364
Bldg. & Bldg. Improvements	6,690
Tenant improvements	547
Construction in Progress	1
Total	9,618
Accumulated Depreciation	$ (444)
Depr. Life	40 years
Location 33 | Industrial/Warehouse Building | Windsor, CT
Real Estate and Accumulated Depreciation
Encumbrances	$ 12,842
Initial Cost
Land	26
Cost Capitalized Subsequent to Acquisition Improvements	15,443
Gross Amount at the end of the period
Land	26
Land improvements	3,340
Bldg. & Bldg. Improvements	10,976
Tenant improvements	1,127
Total	15,469
Accumulated Depreciation	$ (146)
Depr. Life	40 years
Location 34 | Industrial/Warehouse Building | Allentown, PA
Initial Cost
Land	$ 2,344
Cost Capitalized Subsequent to Acquisition Improvements	8,057
Gross Amount at the end of the period
Land	2,344
Land improvements	2,982
Bldg. & Bldg. Improvements	5,068
Construction in Progress	7
Total	10,401
Accumulated Depreciation	$ (68)
Depr. Life	40 years
NE Tradeport | Undeveloped Land
Initial Cost
Land	$ 712
Cost Capitalized Subsequent to Acquisition Improvements	2,116
Gross Amount at the end of the period
Land	712
Land improvements	90
Development Costs	2,026
Total	2,828
Accumulated Depreciation	(66)
Griffin Center/Griffin Center South | Undeveloped Land
Initial Cost
Land	435
Cost Capitalized Subsequent to Acquisition Improvements	1,572
Gross Amount at the end of the period
Land	435
Land improvements	451
Development Costs	1,121
Total	2,007
Accumulated Depreciation	(444)
Phoenix Crossing [Member] | Undeveloped Land
Initial Cost
Land	60
Cost Capitalized Subsequent to Acquisition Improvements	1,421
Gross Amount at the end of the period
Land	60
Development Costs	1,421
Total	1,481
Other | Undeveloped Land
Initial Cost
Land	2,120
Cost Capitalized Subsequent to Acquisition Improvements	1,845
Gross Amount at the end of the period
Land	685
Land improvements	1,307
Development Costs	538
Total	2,530
Accumulated Depreciation	(1,004)
Other | Undeveloped Land | Cabarrus County, NC
Initial Cost
Land	2,716
Cost Capitalized Subsequent to Acquisition Improvements	423
Gross Amount at the end of the period
Land	2,716
Construction in Progress	423
Total	$ 3,139