Equity Incentive Plans and Stock-Based Compensation - Option Activity Under Stock Plans (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
Stock Options
Outstanding, beginning balance (in shares)	13,898
Granted (in shares)	2,995
Exercised (in shares)	(5,221)
Forfeited (in shares)	(592)
Expired (in shares)	0
Outstanding, ending balance (in shares)	11,080	13,898
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 3.32
Granted (in dollars per share)	0.10
Exercised (in dollars per share)	1.29
Forfeited (in dollars per share)	1.80
Expired (in dollars per share)	0
Outstanding, ending balance (in dollars per share)	$ 3.49	$ 3.32
Outstanding, Weighted-Average Remaining Contractual Life (years)	7 years 9 months 18 days	7 years 8 months 12 days
Outstanding, Aggregate Intrinsic Value	$ 216,010	$ 169,324
Vested and exercisable, Number of Stock Options (in shares)	4,990
Vested and exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 4.59
Vested and exercisable, Weighted-Average Remaining Contractual Life (years)	6 years 7 months 6 days
Vested and exercisable, Aggregate Intrinsic Value	$ 91,793