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DEBT - Interest Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]      
Interest expense $ 1,550 $ 77 $ 398
Interest expense      
Debt Instrument [Line Items]      
Interest expense 977 0 0
Accretion expense related to discount and issuance costs      
Debt Instrument [Line Items]      
Interest expense 442 0 0
Accretion expense for GP Sponsor note payable      
Debt Instrument [Line Items]      
Interest expense 0 0 185
Interest on other borrowings      
Debt Instrument [Line Items]      
Interest expense $ 131 $ 77 $ 213