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Accrued Expenses - Summary of Accrued Expenses (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Mar. 31, 2016
Payables And Accruals [Abstract]    
Accrued compensation $ 3,318 $ 2,221
Accrued legal and professional fees 572 168
Other accrued expenses 211 61
Accrued expenses $ 4,101 $ 2,450