Share-based compensation - Schedule of Unrecognized Compensation Cost Related to Outstanding Awards (Details) - Omnibus Plan $ in Millions	12 Months Ended
	Jan. 31, 2026 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 34.8
Weighted average period	1 year 7 months 6 days

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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