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Note 14 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Jan. 01, 2018
Dec. 31, 2017
Nov. 30, 2020
Nov. 30, 2019
Nov. 30, 2018
Effective Income Tax Rate Reconciliation, Combined Federal and Provincial Statutory Income Tax Rate, Percent     27.00% 27.00% 26.92%
Effective Income Tax Rate Reconciliation, Deduction, Foreign Derived Intangible Income, Percent     37.50%    
Deferred Tax Assets, Valuation Allowance, Total     $ 271,016 $ 260,920  
Unrecognized Tax Benefits, Ending Balance     0 0 $ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total     0    
Capital Loss Carryforward [Member]          
Tax Credit Carryforward, Amount     $ 364,799 $ 354,356  
Tax and Revenue Administration, British Columbia [Member]          
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent 12.00% 11.00%