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SUPPLEMENTAL DISCLOSURE WITH RESPECT TO CASH FLOWS (Tables)
12 Months Ended
Dec. 31, 2018
Statements Line Items  
Disclosure of detailed information about cash flows [Table Text Block]
   Year ended 
   December 31,  December 31, 
   2018  2017 
        
 Net changes in non-cash working capital:      
    Accounts receivable$ 7,303 $ (8,520)
    Inventories (3,304) 884 
    Prepaid expenses (793) 126 
    Accounts payable and accrued liabilities 421  963 
    Income taxes payable 865  (1,446)
  $ 4,492 $ (7,993)
        
 Non-cash financing and investing activities:      
      Reclamation included in mineral property, plant and equipment 63  50 
    Fair value of exercised options allocated to share capital 131  65 
    Fair value of performance share units allocated to share capital -  439 
    Fair value of shares issued on property acquisition -  500 
        
 Other cash disbursements:      
    Income taxes paid 3,449  8,015 
    Special mining duty paid 1,012  2,020