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FINANCIAL INSTRUMENTS (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Statement [Line Items]    
Cash $ 11,713 $ 9,625
Amounts receivable 529 1,477
Long-term investments 4,176 4,311
Warrant liability 2,295 $ 1,579
Level 1 of fair value hierarchy [Member]    
Statement [Line Items]    
Cash 11,713  
Amounts receivable 0  
Long-term investments 4,176  
Total financial assets 15,889  
Warrant liability 0  
Total financial liabilities 0  
Level 2 of fair value hierarchy [Member]    
Statement [Line Items]    
Cash 0  
Amounts receivable 529  
Long-term investments 0  
Total financial assets 529  
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 0  
Total financial assets 0  
Warrant liability (2,295)  
Total financial liabilities $ (2,295)