Net Loss Per Ordinary Share - Computation of Basic and Diluted Loss Per Ordinary Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jul. 31, 2024	Apr. 30, 2024	Jul. 31, 2023	Apr. 30, 2023	Jul. 31, 2024	Jul. 31, 2023
Numerator:
Net loss	$ (34,889)	$ (37,932)	$ (31,198)	$ (35,902)	$ (72,821)	$ (67,100)
Denominator:
Weighted-average ordinary shares - basic	41,129,754		39,736,704		40,952,373	39,538,748
Weighted-average ordinary shares - diluted	41,129,754		39,736,704		40,952,373	39,538,748
Net loss per ordinary share:
Basic	$ (0.85)		$ (0.79)		$ (1.78)	$ (1.7)
Diluted	$ (0.85)		$ (0.79)		$ (1.78)	$ (1.7)