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FAIR VALUE DISCLOSURES (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
derivative
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Apr. 30, 2020
USD ($)
Asset impairment charge $ 445 $ 75 $ 0  
Senior Secured Credit Facility [Member] | Term Loan [Member]        
Long-term debt, gross 65,900      
Senior Secured Credit Facility [Member] | Delayed Draw Term Loan [Member]        
Long-term debt, gross $ 113,600      
Contingent Value Rights [Member] | Discount rate        
Fair values inputs discount rate 15.00%      
Interest rate swap [Member]        
Number of interest rate swaps terminated | derivative 2      
Number of derivative instruments held | derivative 1      
Fair value interest rate derivative liabilities $ 14,109 6,215    
Derivative liability, notional amount       $ 184,200
Interest rate swap [Member] | Fair Value, Inputs, Level 2 [Member]        
Fair value interest rate derivative liabilities 14,109 $ 6,215    
Interest rate swap [Member] | Senior Secured Credit Facility [Member]        
Derivative liability, notional amount $ 179,400