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RECLAMATION PROVISION (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Reclamation Provision    
Balance at beginning of the year $ 6,962,911 $ 4,369,486
Changes in estimates 3,900,447 2,517,928
Unwinding of discount 248,267 214,787
Effect of movements in exchange rates 526,532 (139,290)
Balance at end of the year $ 11,638,157 $ 6,962,911