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RECEIVABLES (Tables)
3 Months Ended
Mar. 31, 2016
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
    March 31,     December 31,  
    2016     2015  
Current            
   Trade receivables - mineral concentrate sales $ 8,345   $ 1,868  
   Trade receivables - other   925     749  
  $ 9,270   $ 2,617  
Non-current            
   Notes receivable and other (1) $ 1,209   $ 1,096  
  $ 1,209   $ 1,096