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CAPITAL STOCK - Narrative (Details)
 12 Months Ended
Dec. 31, 2020
rate
$ / shares
shares
Dec. 31, 2019
shares
Dec. 31, 2018
shares
Class of Stock [Line Items]      
Treasury shares outstanding (in shares) 0 0 0
Series A preferred stock      
Class of Stock [Line Items]      
Preferred stock, shares outstanding (in shares) 1,122 1,122 1,122
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares $ 100    
Preferred stock, votes per each share | rate 0.10    
Series B Preferred Stock      
Class of Stock [Line Items]      
Preferred stock, shares outstanding (in shares) 15,000 15,000 15,000
Series B convertible preferred stock      
Class of Stock [Line Items]      
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares $ 100    
Convertible preferred stock, shares Issued upon conversion (in shares) 56    
Preferred stock, dividend rate per share (in dollars per share) | $ / shares $ 0.50    
Preferred stock, votes per each share | rate 0.10