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FAIR VALUE ACCOUNTING (Details)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
shares
Jun. 23, 2021
$ / shares
Dec. 31, 2020
USD ($)
Liabilities:        
Long term debt   $ 48,500   $ 48,200
Gold Bar mine        
Liabilities:        
Impairment of long-lived assets $ 83,800      
Recurring        
Assets:        
Investments   1,616    
Recurring | Level 1        
Assets:        
Investments   1,616    
Marketable equity securities. | Recurring        
Assets:        
Investments   1,616    
Marketable equity securities. | Recurring | Level 1        
Assets:        
Investments   $ 1,616    
Warrant        
Liabilities:        
Price per common share for each warrant | $ / shares     $ 0.60  
Warrants exercised | shares   0    
Warrant | Volatility | Valuation Technique, Option Pricing Model        
Liabilities:        
Average volatility   94.6