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Note 4 - Investment in Donlin Gold (Tables)
 12 Months Ended
Nov. 30, 2017
Donlin Gold [Member]  
Notes Tables  
Equity Method Investments [Table Text Block]
    Years ended November 30,
    2017   2016   2015
Balance – beginning of period   $
951
     $
1,058
     $
1,618
  
Share of losses                        
Mineral property expenditures    
(11,139
 )    
(8,689
 )    
(10,845
 )
Depreciation    
(80
 )    
(130
 )    
(171
 )
     
(11,219
 )    
(8,819
 )    
(11,016
 )
Funding    
11,368
      
8,712
      
10,456
  
Balance – end of period   $
1,100
     $
951
     $
1,058
  
    At November 30,
    2017   2016
Current assets: Cash, prepaid expenses and other receivables   $
2,075
     $
1,540
  
Non-current assets: Property and equipment    
23
      
101
  
Non-current assets: Mineral property    
32,692
      
32,692
  
Current liabilities: Accounts payable and accrued liabilities    
(998
 )    
(690
 )
Non-current liabilities: Reclamation obligation    
(692
 )    
(692
 )
Net assets   $
33,100
     $
32,951