Derivative instruments and hedging activities - Schedule of Effect of Derivative Instruments on the Company’s Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Non-designated hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss) on derivative, net	$ (18)	$ (14)	$ (42)	$ 236
Foreign currency cash flow hedges \| Designated as Hedging Instrument \| Location, Statement of Income, Balance [Axis]: us-gaap:CostsAndExpenses
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss) on derivative, net	124	(159)	51	(139)
Foreign currency cash flow hedges \| Designated as Hedging Instrument \| Location, Statement of Income, Balance [Axis]: us-gaap:IncomeTaxExpenseBenefit
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss) on derivative, net	$ 0	$ 0	$ 0	$ 0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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