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Note 9 - Subsidiaries (Tables)
 12 Months Ended
May 31, 2019
Notes Tables  
Schedule of Significant Subsidiaries [Table Text Block]
    Country of Incorporation   Principal
Activity		   The Company’s
effective
interest for
2019		   The Company’s
effective
interest for
2018
                 
Corvus Gold (USA) Inc.  
USA
  
Holding company
    
100
 %    
100
 %
Raven Gold Alaska Inc.  
USA
  
Exploration company
    
100
 %    
100
 %
Corvus Gold Nevada Inc.  
USA
  
Exploration company
    
100
 %    
100
 %
SoN Land & Water LLC  
USA
  
Exploration company
    
100
 %    
100
 %
Mother Lode Mining Company LLC  
USA
  
Exploration company
    
100
 %    
100
 %