Stock-based compensation - Schedule of Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 22,210	$ 19,068	$ 41,616	$ 33,404
Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	2,713	3,114	5,500	6,501
Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	10,090	8,693	18,232	8,852
Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	6,178	5,732	10,131	11,652
Income Statement Location [Axis]: us-gaap:SellingAndMarketingExpense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 3,229	$ 1,529	$ 7,753	$ 6,399

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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