Related party transactions (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2026	Apr. 30, 2025	Jan. 31, 2026
Related Party Transaction [Line Items]
Revenue	$ 130,935	$ 115,936
Accounts receivable	89,607		$ 97,453
Related Party
Related Party Transaction [Line Items]
Revenue	319	$ 188
Accounts receivable	$ 0		$ 450

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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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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