Stock-Based Compensation - Stock Option Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Number of Options
Outstanding, beginning of period (in shares)	42,422,473
Outstanding, end of period (in shares)	32,446,814	42,422,473
Stock options
Number of Options
Outstanding, beginning of period (in shares)	42,422,473
Granted (in shares)	0
Exercised (in shares)	(7,650,525)
Forfeited (in shares)	(2,703,962)
Assumed options from Attivo acquisition (in shares)	378,828
Outstanding, end of period (in shares)	32,446,814	42,422,473
Expected to vest (in shares)	32,446,814
Options, vested and exercisable, number (in shares)	19,645,571
Weighted-Average Exercise Price
Outstanding, beginning of period (in USD per share)	$ 4.30
Granted (in USD per share)	0
Exercised (in USD per share)	2.26
Forfeited (in USD per share)	4.68
Share-based Compensation Arrangements by Share-based Payment Award, Options, Acquired in Period, Weighted Average Exercise Price	1.31
Outstanding, end of period (in USD per share)	4.71	$ 4.30
Expected to vest (in USD per shares)	4.71
Options, vested and exercisable, weighted average exercise price (in USD per share)	$ 3.54
Weighted-Average Remaining Contractual Term (in years)
Weighted-Average Remaining Contractual Term (in years), Outstanding	6 years 6 months 7 days	6 years 6 months
Expected to vest (in years)	6 years 6 months 7 days
Weighted-Average Remaining Contractual Term (in years), Vested and exercisable (in years)	5 years 11 months 19 days
Aggregate Intrinsic Value (in thousands)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 337,214	$ 1,714,821
Expected to vest	337,214
Vested and exercisable	$ 227,200