Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable (Details)

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Accounts Receivable (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Mar. 31, 2018
Receivables [Abstract]      
Billed $ 12,780   $ 9,172
Unbilled 7,356   8,390
Allowance for doubtful accounts (790)   (512)
Accounts receivable, net 19,346   $ 17,050
Write-offs $ 89 $ 64