Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT - Long-Term Debt (Details)

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LONG-TERM DEBT - Long-Term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Unamortized discounts and debt issuance costs $ (3,676) $ (3,902)
Long-term debt, net 103,974 104,023
Current portion of long-term debt (1,100) (1,100)
Long-term debt, net of current portion, unamortized discount and issuance costs 102,874 102,923
Senior Secured Notes Due 2024 | Senior Secured Notes    
Debt Instrument [Line Items]    
Outstanding principal $ 107,650 $ 107,925