Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses - Schedule of Accrued Expenses (Detail)

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Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Mar. 31, 2019
Payables and Accruals [Abstract]    
Research and development expenses $ 4,136 $ 4,815
Legal and other professional fees 3,592 1,106
Other expenses 977 304
Total accrued expenses $ 8,705 $ 6,225