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Note 5 - Investment in Donlin Gold - Summary of the Company's Investment in Donlin Gold LLC (Details) - USD ($)
$ in Thousands
 3 Months Ended
Feb. 28, 2021
Feb. 29, 2020
Nov. 30, 2020
Income (Loss) from Equity Method Investments, Total $ (1,968) $ (1,568)  
Current assets: Cash, prepaid expenses and other receivables 189,243   $ 196,386
Current liabilities: Accounts payable and accrued liabilities (563)   (900)
Donlin Gold [Member]      
Balance – beginning of period 2,614 1,840  
Mineral property expenditures (1,901) (1,543)  
Depreciation (67) (25)  
Income (Loss) from Equity Method Investments, Total (1,968) (1,568)  
Funding 2,946 2,600  
Balance – end of period 3,592 $ 2,872  
Current assets: Cash, prepaid expenses and other receivables 3,672   2,654
Non-current assets: Property and equipment 1,320   1,339
Non-current assets: Mineral property 32,615   32,615
Current liabilities: Accounts payable and accrued liabilities (1,307)   (1,271)
Non-current liabilities: Reclamation and lease obligations (708)   (723)
Net assets $ 35,592   $ 34,614