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15. RECLAMATION OBLIGATIONS (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
DisclosureOfReclamationObligationsLineItems [Line Items]    
Reclamation obligations, beginning $ 20,965 $ 19,460
Expenditures incurred (754) (502)
Reclamation obligations, ending 22,724 20,965
Reclamation Obligations    
DisclosureOfReclamationObligationsLineItems [Line Items]    
Reclamation obligations, beginning 20,965 19,460
Accretion 999 903
Expenditures incurred (754) (502)
Liability adjustments-income statement 56 461
Liability adjustments-balance sheet (20) 50
Foreign exchange 1,478 593
Reclamation obligations, ending $ 22,724 $ 20,965