Real Estate Assets - pro forma results (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Nov. 30, 2018 USD ($) ft² $ / shares	Nov. 30, 2017 USD ($) $ / shares	Nov. 30, 2016 USD ($) $ / shares
Real Estate Assets
Rental revenue	$ 32,777	$ 29,939	$ 26,487
Revenue from property sales	1,023	13,945	4,364
Total revenue	33,800	43,884	30,851
Operating expenses of rental properties	9,532	8,866	8,250
Depreciation and amortization expense	11,404	10,064	8,797
Costs related to property sales	144	3,780	810
General and administrative expenses	7,749	8,552	7,367
Total expenses	28,829	31,262	25,224
Operating income	4,971	12,622	5,627
Interest expense	(6,270)	(5,690)	(4,545)
(Loss) income before income tax provision	(1,148)	7,300	1,311
Income tax provision	505	2,673	735
Net (loss) income	$ (1,653)	$ 4,627	$ 576
Earnings per share:
Basic (in dollars per share) | $ / shares	$ (0.33)	$ 0.92	$ 0.11
Diluted (in dollars per share) | $ / shares	$ (0.33)	$ 0.92	$ 0.11
215 International
Real Estate Assets
Rental revenue	$ 722
Operating income	$ 112
Earnings per share:
Unleased space | ft²	73,000
215 International | As reported
Real Estate Assets
Rental revenue	$ 29,939
Revenue from property sales	13,945
Total revenue	43,884
Operating expenses of rental properties	8,866
Depreciation and amortization expense	10,064
Costs related to property sales	3,780
General and administrative expenses	8,552
Total expenses	31,262
Operating income	12,622
Interest expense	(5,690)
Other non-operating income	368
(Loss) income before income tax provision	7,300
Income tax provision	(2,673)
Net (loss) income	$ 4,627
Earnings per share:
Basic (in dollars per share) | $ / shares	$ 0.92
Diluted (in dollars per share) | $ / shares	$ 0.92
215 International | Adjustments
Real Estate Assets
Rental revenue	$ 370
Total revenue	370
Operating expenses of rental properties	39
Depreciation and amortization expense	470
Total expenses	509
Operating income	(139)
(Loss) income before income tax provision	(139)
Income tax provision	51
Net (loss) income	(88)
215 International | Pro forma
Real Estate Assets
Rental revenue	30,309
Revenue from property sales	13,945
Total revenue	44,254
Operating expenses of rental properties	8,905
Depreciation and amortization expense	10,534
Costs related to property sales	3,780
General and administrative expenses	8,552
Total expenses	31,771
Operating income	12,483
Interest expense	(5,690)
Other non-operating income	368
(Loss) income before income tax provision	7,161
Income tax provision	(2,622)
Net (loss) income	$ 4,539
Earnings per share:
Basic (in dollars per share) | $ / shares	$ 0.91
Diluted (in dollars per share) | $ / shares	$ 0.90