Net Loss Per Share - Computation of Earnings Per Share Basic and Diluted (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net loss available to ordinary shareholders - basic and diluted	$ (125,130)	$ (111,032)
Net loss available to ordinary shareholders - basic and diluted	$ (125,130)	$ (111,032)
Denominator:
Weighted-average shares outstanding - basic and diluted	101,910,562	91,637,966
Loss per share - basic and diluted	$ (1.23)	$ (1.21)