Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT - Schedule of Debt (Details)

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LONG-TERM DEBT - Schedule of Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Mar. 31, 2021
Apr. 13, 2020
Dec. 27, 2018
Debt Instrument        
Senior Secured Term Loan       $ 150,000
Less: current portion $ (11,850) $ (1,850)    
Less: unamortized debt issuance costs (8,808) (9,686)    
Long-term debt, net of current portion 81,305 90,890    
Notes Payable | Paycheck Protection Program Loan        
Debt Instrument        
Paycheck Protection Program Loan 10,000 10,000 $ 10,000  
Senior Secured Debt | Senior Secured Term Loan        
Debt Instrument        
Senior Secured Term Loan $ 91,963 $ 92,426