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Accounts Receivable (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Mar. 31, 2020
Receivables [Abstract]          
Billed $ 28,672   $ 28,672   $ 18,927
Unbilled 35,268   35,268   18,267
Allowance for doubtful accounts (4,913)   (4,913)   (4,059)
Accounts receivable, net 59,027   59,027   $ 33,135
Bad debt expense $ 187 $ 56 $ 415 $ 184