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FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Non-Recurring Fair Value Measurements (Details) - Fair Value, Nonrecurring
$ in Thousands
Dec. 31, 2020
USD ($)
Quoted Prices in Active Markets for Identical Assets (Level 1)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contingent consideration - acquisition $ 0
Significant Other Observable Inputs (Level 2)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contingent consideration - acquisition 0
Significant Unobservable Inputs (Level 3)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contingent consideration - acquisition $ 1,919