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RECLAMATION PROVISION (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Reclamation Provision    
Balance at beginning of the year $ 10,799 $ 11,638
Changes in estimates 840 (437)
Disposition of Bralorne (Note 5) (10,828)
Unwinding of discount related to Bralorne 217 256
Unwinding of discount related to continuing operations 104 122
Effect of movements in exchange rates 392 (780)
Balance at end of the year 1,524 10,799
Less: current portion (296)
Non-current portion $ 1,524 $ 10,503