Annual report pursuant to Section 13 and 15(d)

BORROWINGS - Schedule of Borrowings (Details)

v3.20.4
BORROWINGS - Schedule of Borrowings (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
May 23, 2019
Debt Instrument [Line Items]        
Principal repayment obligation and other fees $ 119,217 $ 144,955    
Unamortized DFC and discounts (8,123) (8,306)    
Carrying value 111,094 136,649    
Paid-in-kind interest 3,317 0 $ 0  
2020 Unsecured Note        
Debt Instrument [Line Items]        
Principal repayment obligation and other fees 16,000      
Unamortized DFC and discounts (2,376)      
Carrying value 13,624      
2019 Term Loan        
Debt Instrument [Line Items]        
Principal repayment obligation and other fees 43,217 84,955    
Unamortized DFC and discounts (4,942) (6,427)    
Carrying value 38,275 78,528    
Paid-in-kind interest 3,300 1,800    
2019 Term Loan | Loans Payable        
Debt Instrument [Line Items]        
Final payment fee (as a percentage)       20.00%
2018 Term Loan, due September 2021        
Debt Instrument [Line Items]        
Principal repayment obligation and other fees 60,000 60,000    
Unamortized DFC and discounts (805) (1,879)    
Carrying value $ 59,195 $ 58,121