Employee Stock Plans - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2026	Apr. 30, 2025
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	$ 33,601	$ 30,399
Capitalized stock-based compensation expense	637	573
Total stock-based compensation expense	34,238	30,972
Income Statement Location [Axis]: us-gaap:CostOfRevenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	1,206	1,077
Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	7,171	7,975
Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	14,640	11,336
Income Statement Location [Axis]: us-gaap:SellingAndMarketingExpense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	$ 10,584	$ 10,011

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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-Topic 718
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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