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FINANCIAL INSTRUMENTS (Details 2) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Statement [Line Items]    
Amounts receivable $ 1,513 $ 529
Long-term investments 3,304 4,176
Warrant liability 733 $ 278
Level 1 of fair value hierarchy [Member]    
Statement [Line Items]    
Cash 22,341  
Amounts receivable 0  
Long-term investments 3,304  
Total financial assets 25,645  
Warrant liability 0  
Total financial liabilities 0  
Level 2 of fair value hierarchy [Member]    
Statement [Line Items]    
Cash 0  
Amounts receivable 1,513  
Long-term investments 0  
Total financial assets 1,513  
Warrant liability 0  
Total financial liabilities 0  
Level 3 of fair value hierarchy [Member]    
Statement [Line Items]    
Cash 0  
Amounts receivable 0  
Long-term investments 40  
Total financial assets 40  
Warrant liability (761)  
Total financial liabilities $ (761)