Net Loss Per Share - Summary of Number of Ordinary Shares Excluded from Computation of Earnings Per Share (Detail) - shares	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Ordinary shares issuable excluded from computation of earnings per share	2,888,719	2,717,924	3,078,611
Exercise Of Options To Purchase Ordinary Shares [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Ordinary shares issuable excluded from computation of earnings per share	1,810,785	1,848,052	1,936,397
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Ordinary shares issuable excluded from computation of earnings per share	902,409	694,347	966,689
Exercise Of Warrants At $16.14 Per Share [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Ordinary shares issuable excluded from computation of earnings per share	111,525	111,525	111,525
Exercise Of Warrants At $9.375 Per Share [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Ordinary shares issuable excluded from computation of earnings per share	64,000	64,000	64,000