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Fair Value Measurements - Financial Assets and Liabilities Measured At Fair Value Using Significant Unobservable Inputs (Level 3) (Details ) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Company's assets measured at fair value using significant unobservable inputs (Level 3)      
Balance $ 1,925 $ 1,900  
Fair value adjustments 25 50 $ 400
Balance $ 1,950 $ 1,950