Net Loss Per Share - Computation of Loss Per Share Basic and Diluted (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net loss available to ordinary shareholders - basic	$ (38,868)	$ (27,292)
Net loss available to ordinary shareholders - diluted	$ (38,868)	$ (27,292)
Denominator:
Weighted average ordinary shares outstanding	103,840,009	101,390,749
Assumed exercise of pre-funded warrants	751,831	0
Weighted-average shares outstanding - basic	104,591,840	101,390,749
Weighted-average shares outstanding - diluted	104,591,840	101,390,749
Loss per share - basic	$ (0.37)	$ (0.27)
Loss per share - diluted	$ (0.37)	$ (0.27)