Net Loss Per Ordinary Share - Computation of Basic and Diluted Loss Per Ordinary Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Oct. 31, 2023	Jul. 31, 2023	Apr. 30, 2023	Oct. 31, 2022	Jul. 31, 2022	Apr. 30, 2022	Oct. 31, 2023	Oct. 31, 2022
Numerator:
Net loss	$ (41,710)	$ (31,198)	$ (35,902)	$ (19,809)	$ (23,650)	$ (10,822)	$ (108,810)	$ (54,281)
Denominator:
Weighted-average ordinary shares - basic	40,053,251			38,582,584			39,710,248	38,185,421
Weighted-average ordinary shares - diluted	40,053,251			38,582,584			39,710,248	38,185,421
Net loss per ordinary share:
Basic	$ (1.04)			$ (0.51)			$ (2.74)	$ (1.42)
Diluted	$ (1.04)			$ (0.51)			$ (2.74)	$ (1.42)