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FINANCIAL INSTRUMENTS (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
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  
Long-term investments 10 34 27  
Reclamation bonds 107 714 108 $ 108
Amounts receivable 4,091 4,635 3,050  
Accounts payable and accrued liabilities 5,885 3,512 3,726  
Due to related parties 157 187 199  
Equipment loans 411 398 1,191  
Finance lease obligations 869 1,233 $ 1,377  
MXN [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 8,378 9,504    
Long-term investments    
Reclamation bonds    
Amounts receivable    
Accounts payable and accrued liabilities (85,951) (27,482)    
Due to related parties    
Equipment loans    
Finance lease obligations (13,907) (751)    
Net exposure (91,480) (18,729)    
US dollar equivalent (4,656) (949)    
C$ [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 2,421 321    
Long-term investments 14 42    
Reclamation bonds 146 896    
Amounts receivable 114 132    
Accounts payable and accrued liabilities (891) (603)    
Due to related parties (215) (225)    
Equipment loans (301) (782)    
Finance lease obligations (533) (1,002)    
Net exposure 755 (1,221)    
US dollar equivalent $ 554 $ (974)