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FAIR VALUE MEASUREMENTS - Reconciliation of Changes in Level 3 Liabilities (Details)
$ in Thousands
6 Months Ended
Sep. 30, 2020
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Balance at March 31, 2020 $ (1,748)
Payments made 1,000
Balance at September 30, 2020 $ (748)