Net Loss Per Ordinary Share - Computation of Basic and Diluted Net Loss Per Ordinary Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Numerator:
Net loss	$ (24,328)	$ (37,932)
Denominator:
Weighted-average ordinary shares - basic	42,219,972	40,774,991
Weighted-average ordinary shares - diluted	42,219,972	40,774,991
Net loss per ordinary share:
Basic	$ (0.58)	$ (0.93)
Diluted	$ (0.58)	$ (0.93)