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FINANCE LEASE OBLIGATIONS (Details Narrative) - Lease [member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information about property, plant and equipment [line items]      
Finance lease expiration description The Company has entered into mining equipment leases expiring between 2018 and 2021    
Line of credit facilities $ 10,375    
Remaining line of credit facilities 8,224    
Net carrying amount $ 3,461 $ 3,951 $ 4,801
Bottom of range [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Interest rate 0.00%    
Top of range [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Interest rate 14.49%