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Note 4 - Investment in Donlin Gold - Summary of the Company's Investment in Donlin Gold LLC (Details) - USD ($)
$ in Thousands
 3 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Nov. 30, 2017
$ (2,094) $ (2,232)  
Donlin Gold [Member]      
Balance – beginning of period 1,100 951  
Mineral property expenditures (1,835) (2,059)  
Depreciation (6) (23)  
(1,841) (2,082)  
Funding 1,734 2,410  
Balance – end of period 993 $ 1,279  
Current assets: Cash, prepaid expenses and other receivables 1,689   $ 2,075
Non-current assets: Property and equipment 17   23
Non-current assets: Mineral property 32,692   32,692
Current liabilities: Accounts payable and accrued liabilities (713)   (998)
Non-current liabilities: Reclamation obligation (692)   (692)
Net assets $ 32,993   $ 33,100