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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
Jul. 27, 2018
Nov. 30, 2020
Dec. 01, 2019
Nov. 30, 2019
Nov. 30, 2018
Nov. 30, 2017
Financing Receivable, after Allowance for Credit Loss, Total   $ 96,016   $ 92,679 $ 89,459 $ 0
Operating Lease, Right-of-Use Asset   600   $ 0    
Operating Lease, Liability, Total   $ 611        
Accounting Standards Update 2016-02 [Member]            
Operating Lease, Right-of-Use Asset     $ 399      
Operating Lease, Liability, Total     $ 399      
Note Receivable Upon Completion of Galore Creek Project Pre-feasibility [Member]            
Financing Receivable, after Allowance for Credit Loss, Total $ 75,000          
GCP [Member]            
Discontinued Operation, Ownership Percentage, Sold 50.00%          
Copper Canyon Property [Member]            
Discontinued Operation, Ownership Percentage, Sold 40.00%