Note 14 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2018
Loss before income taxes and other items	$ (34,345)	$ (26,483)	$ (30,940)
Combined federal and provincial statutory tax rate	27.00%	27.00%	26.92%
Income tax recovery based on statutory income tax rates	$ (9,273)	$ (7,150)	$ (8,329)
Reconciling items:
Non-deductible expenditures	1,911	2,136	2,150
Foreign accrual property income (FAPI)	652	180	580
Effect of consolidated return for U.S. subsidiaries	(751)	0	0
Effect of different statutory tax rates on earnings or losses of subsidiaries	(2)	(658)	(574)
Effect of statutory tax rate change	0	0	73,135
Change in valuation allowance on deferred tax assets	6,638	6,773	(66,466)
Other	44	(3)	30
Income tax (recovery) expense	$ (781)	$ 1,278	$ 526
Effective tax rate	2.30%	(4.80%)	(1.70%)