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FINANCIAL INSTRUMENTS (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
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 $ 9,625 $ 3,252
Amounts receivable 1,477 4,091
Long-term investments – common shares 4,311 10
Warrant liability 1,579 $ 2,009
Level 1 of fair value hierarchy [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 9,625  
Amounts receivable  
Long-term investments – common shares 3,197  
Long-term investments – warrants  
Total financial assets 12,822  
Warrant liability  
Total financial assets and liabilities  
Level 2 of fair value hierarchy [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  
Amounts receivable 1,477  
Long-term investments – common shares  
Long-term investments – warrants  
Total financial assets 1,477  
Warrant liability  
Total financial assets and liabilities  
Level 3 of fair value hierarchy [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  
Amounts receivable  
Long-term investments – common shares  
Long-term investments – warrants 1,114  
Total financial assets 1,114  
Warrant liability (1,579)  
Total financial assets and liabilities $ (1,579)