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Equity Plans and Stock-based Compensation - Schedule of Stock-Based Compensation Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total stock-based compensation expense $ 17,863 $ 21,599
Cost of revenue    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total stock-based compensation expense 1,223 1,084
Research and development    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total stock-based compensation expense 8,614 8,303
Sales and marketing    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total stock-based compensation expense 3,079 5,441
General and administrative    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total stock-based compensation expense $ 4,947 $ 6,771