Stock-Based Compensation - Components of Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total	$ 87,889	$ 15,912
Cost of revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total	3,618	308
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total	35,358	6,590
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total	15,460	3,835
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total	$ 33,453	$ 5,179