Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Operating activities:
Net income (loss)	$ 3,668	$ (1,653)	$ 4,627
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	11,801	11,404	10,064
Gain on sales of properties	(7,829)	(879)	(10,165)
Impairment loss	3,100	0	0
Noncash rental revenue including straight-line rents	(1,567)	(1,669)	(2,097)
Deferred income taxes	(301)	428	2,623
Amortization of debt issuance costs	313	297	333
Stock-based compensation expense	261	350	349
Gain on insurance recovery	(126)
Payment of employee withholding taxes on options exercised	(87)	(39)
Amortization of terminated swap agreement	31	211	98
Gain on sales of common stock of Centaur Media plc			(275)
Changes in assets and liabilities:
Other assets	207	(123)	(1,238)
Accounts payable and accrued liabilities	(119)	(339)	303
Deferred revenue	1,782	253	3,681
Other liabilities	135	200	1,076
Net cash provided by operating activities	11,269	8,441	9,379
Investing activities:
Additions to real estate assets	(29,365)	(28,621)	(17,605)
Short-term investments, net	15,989	(17,000)
Acquisition of building	(10,168)		(18,440)
Proceeds from sales of properties, net of expenses	9,475	998	13,027
Deferred leasing costs and other	(959)	(802)	(1,556)
Proceeds from sales of properties returned from escrow, net		91	3,444
Proceeds from sales of common stock of Centaur Media plc			1,216
Net cash used in investing activities	(15,028)	(45,334)	(19,914)
Financing activities:
Proceeds from revolving lines of credit	5,875
Principal payments on mortgage loans	(3,953)	(15,439)	(19,287)
Dividends paid to stockholders	(2,279)	(2,000)	(1,514)
Proceeds from mortgage and construction loans	1,265	31,623	39,125
Proceeds from exercise of stock options	166	1,802
Payment of debt issuance costs	(33)	(569)	(595)
Repurchase of common stock			(1,474)
Payment for termination of interest rate swap agreement			(341)
Net cash provided by financing activities	1,041	15,417	15,914
Net (decrease) increase in cash and cash equivalents	(2,718)	(21,476)	5,379
Cash and cash equivalents at beginning of period	8,592	30,068	24,689
Cash and cash equivalents at end of period	$ 5,874	$ 8,592	$ 30,068