Derivative instruments and hedging activities - Schedule of Fair Values Of Outstanding Derivative Foreign Currency Forward Contract (Details) - Foreign currency cash flow hedges - USD ($) $ in Thousands	Apr. 30, 2026	Jan. 31, 2026
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative asset	$ 214	$ 133
Non-designated hedges
Derivatives, Fair Value [Line Items]
Derivative asset	$ 23	$ 14

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.