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FINANCIAL INSTRUMENTS (Details Narrative)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
USD ($)
Integer
Dec. 31, 2017
USD ($)
Integer
Dec. 31, 2016
USD ($)
Integer
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]      
Cash $ 3,252 $ 3,420 $ 11,780
Credit Risk [Member]      
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]      
Concentration of credit risk, counterparties accounted for trade accounts receivable | Integer 6 3 3
Price Risk [Member]      
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]      
Asset and liability exposure, description Based on outstanding accounts receivable that were subject to pricing adjustments, a 10% change in metals prices would have an impact on net earnings (loss) of approximately $419 (December 31, 2017 - $224).    
Impact on net earning (loss) $ 419 $ 224  
Price Risk [Member] | Long-term investments [Member]      
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]      
Asset and liability exposure, description A 10% change in market prices would not have a material impact on the Company’s operations.    
Foreign Currency Risk [Member]      
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]      
Asset and liability exposure, description A 10% fluctuation in the US/Mexican and Canadian/US exchange rates would impact the Company’s earnings (loss) for the year ended December 31, 2018, by approximately $452 (December 31, 2017 - $327).    
Impact on net earning (loss) $ 452 $ 327  
Liquidity risk [Member]      
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]      
Cash 3,252    
Working capital $ 13,106    
Interest Rate Risk [Member]      
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]      
Asset and liability exposure, description A 10% change in the interest rate would not a result in a material impact on the Company’s operations.