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ROYALTY INTERESTS (Tables)
 12 Months Ended
Dec. 31, 2019
Royalty Interests [Abstract]  
Disclosure of detailed information about royalty interest [Table Text Block]
       
Balance as at December 31, 2017 $ 21,943  
Adjusted for:      
Depletion   (1,732 )
Impairment of royalty interest   (7,256 )
Cumulative translation adjustments   1,391  
Balance as at December 31, 2018   14,346  
Adjusted for:      
Additions   560  
Depletion   (802 )
Cumulative translation adjustments   (616 )
Balance as at December 31, 2019 $ 13,488