Note 14 - Income Taxes - Components of the Company's Deferred Income Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Nov. 30, 2020	Nov. 30, 2019
Net operating loss carry forwards	$ 183,422	$ 175,383
Capital loss carry forwards	49,307	47,953
Mineral properties	654	638
Intangible assets	484	473
Property and equipment	203	194
Investment in affiliates	35,933	33,508
Unpaid interest expense	2,105	2,105
Unrealized loss on investments	316	368
Other	685	569
Deferred Tax Assets, Gross, Total	273,109	261,191
Valuation allowances	(271,016)	(260,920)
Deferred Tax Assets, Net of Valuation Allowance, Total	2,093	271
Investment tax credit	0	(8)
Notes receivable	(1,975)	(759)
Capitalized assets and other	(118)	(255)
Deferred Tax Liabilities, Gross, Total	(2,093)	(1,022)
Net deferred income tax assets (liabilities)	0	(751)
Non-current deferred income tax liabilities	0	(751)
Deferred Tax Liabilities, Net, Total	0	(751)
Other Assets [Member]
Non-current deferred income tax assets	$ 0	$ 0