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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 6 Months Ended
May 31, 2017
May 31, 2016
May 31, 2017
May 31, 2016
Nov. 30, 2016
$ (2,772) $ (2,822) $ (5,004) $ (5,019)  
Donlin Gold [Member]          
Balance – beginning of period 1,279 903 951 1,058  
Mineral property expenditures (2,525) (2,466) (4,584) (4,430)  
Depreciation (22) (36) (45) (75)  
(2,547) (2,502) (4,629) (4,505)  
Funding 2,568 2,886 4,978 4,734  
Balance – end of period 1,300 $ 1,287 1,300 $ 1,287  
Current assets: Cash, prepaid expenses and other receivables 2,086   2,086   $ 1,540
Non-current assets: Property and equipment 59   59   101
Non-current assets: Mineral property 32,692   32,692   32,692
Current liabilities: Accounts payable and accrued liabilities (845)   (845)   (690)
Non-current liabilities: Reclamation obligation (692)   (692)   (692)
Net assets $ 33,300   $ 33,300   $ 32,951