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Restructuring Charge - Summary of Reconciliation of Changes in Restructuring Reserve (Detail) - USD ($)
$ in Thousands
9 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Restructuring And Related Activities [Abstract]    
Balance at beginning of period $ 120 $ 74
Expense for restructuring 316 630
Amounts paid for restructuring (336) (549)
Balance at end of period $ 100 $ 155