Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Feb. 28, 2018	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015
Income tax benefit (expense) on continuing operations
Current federal			$ (43)	$ 50	$ (83)
Current state and local			(7)
Deferred federal			(2,610)	(580)	(217)
Deferred state and local			(13)	(205)	(80)
Total income tax provision			(2,673)	(735)	(380)
Income Taxes, additional disclosures
Charges for expected lower realization of state tax benefits				180	87
Unrecognized tax benefit			900
Tax effect of exercises and forfeitures of stock options			17	17	9
Deferred tax (expense) benefit included in other comprehensive (loss) income
Fair value adjustment of Griffin's cash flow hedges			(463)	(399)	164
Mark to market adjustments on Centaur Media plc			23	347	(16)
Total other comprehensive income (loss), tax			(440)	(52)	148
Differences between income tax benefits at the United States statutory income tax rates and the actual income tax benefits on continuing operations
Tax (provision) benefit at statutory rate			(2,555)	(459)	(282)
State and local taxes, including valuation allowance, net of federal tax effect			(18)	(205)	(80)
Permanent items			(41)	(35)	(23)
Other			(59)	(36)	5
Total income tax provision			(2,673)	(735)	(380)
Deferred tax assets:
Deferred revenue			3,841	3,068
Federal net operating loss carryforwards			3,797	4,037
Retirement benefit plans			1,936	1,675
State net operating loss carryforwards			1,366	1,537
Non-qualified stock options			970	892
Cash flow hedges			159	623
Investment in Centaur Media plc				309
Other			226	285
Total deferred tax assets			12,295	12,426
Valuation allowance			(1,363)	(1,514)
Net deferred tax assets			10,932	10,912
Deferred tax liabilities:
Real estate assets			(7,199)	(4,244)
Deferred rent			(1,291)	(1,095)
Other			(538)	(589)
Total deferred tax liabilities			(9,028)	(5,928)
Net total deferred tax assets			1,904	4,984
Operating loss carryforwards
Accrual for uncertain income tax positions			$ 0
Income tax rate changes
Federal income tax rate			35.00%
Forecast
Deferred tax assets:
Total deferred tax assets	$ 900
Income tax rate changes
Federal income tax rate		22.20%
Subsequent events
Income tax rate changes
Federal income tax rate		21.00%
State
Income Taxes, additional disclosures
Effect on income tax benefit for valuation allowance			$ 238	1,798	(76)
Operating loss carryforwards
Net operating loss carryforwards			100
Federal
Income Taxes, additional disclosures
Effect on income tax benefit for valuation allowance			87	$ (629)	$ 26
Operating loss carryforwards
Net operating loss carryforwards			$ 10,850
Minimum | Forecast
Income tax rate changes
Expected income tax expense	1,000
Minimum | State
Operating loss carryforwards
Expiration period of operating loss carryforwards			14 years
Minimum | Federal
Operating loss carryforwards
Expiration period of operating loss carryforwards			16 years
Maximum | Forecast
Income tax rate changes
Expected income tax expense	$ 1,100
Maximum | State
Operating loss carryforwards
Expiration period of operating loss carryforwards			19 years
Maximum | Federal
Operating loss carryforwards
Expiration period of operating loss carryforwards			19 years