Net Loss Per Ordinary Share - Computation of Basic and Diluted Loss Per Ordinary Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Numerator:
Net loss	$ (37,932)	$ (35,902)
Denominator:
Weighted-average ordinary shares - basic	40,774,991	39,340,791
Weighted-average ordinary shares - diluted	40,774,991	39,340,791
Net loss per ordinary share:
Basic	$ (0.93)	$ (0.91)
Diluted	$ (0.93)	$ (0.91)