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, 2022
Dec. 31, 2021
Feb. 12, 2021
Debt Instrument [Line Items]      
Unamortized discounts and debt issuance costs $ (9,410) $ (8,381)  
Long-term debt, net 400,590 301,619  
Long-term debt, net of current portion, unamortized discount and issuance costs 400,590 301,619  
Senior Secured Notes Due 2028 | Senior Secured Notes      
Debt Instrument [Line Items]      
Outstanding principal 410,000 310,000  
Long-term debt, net     $ 106,800
Estimated fair value $ 421,900 $ 327,500