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Stock-Based Compensation - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 19,455	$ 19,287	$ 54,455	$ 53,889
Unrecognized compensation cost, stock options	153,200		153,200
Stock-based compensation related to internal-use software development	200	500	1,200	1,300
Cost of revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	1,840	1,513	5,597	4,053
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	6,757	9,410	19,635	25,151
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	5,469	4,228	15,285	12,104
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 5,389	$ 4,136	$ 13,938	$ 12,581
Options to purchase common stock
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized compensation cost, period for recognition (in years)			2 years 8 months 23 days

X

- Definition

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

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