Capital Stock - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2024	Jan. 31, 2024
Class Of Stock [Line Items]
Preference shares, shares issued	0	0
Preference shares, shares outstanding	0	0
Share Repurchase Program [Member]
Class Of Stock [Line Items]
Stock repurchased, shares	0
Amount available under stock repurchase program	$ 49.0
ESPP [Member]
Class Of Stock [Line Items]
Additional ordinary shares reserved for issuance	506,506
ESPP [Member] | Scenario, plan automatically increased by the lessor of [Member]
Class Of Stock [Line Items]
Annual increase in ordinary shares for available for future issuance	1,500,000
Annual shares increase for future issuance by percentage under 2012 employee stock purchase plan	1.25%