Equity Incentive Plans and Stock-Based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 2025	Jan. 31, 2025
Stock Options
Outstanding, beginning balance (in shares)	7,935
Granted (in shares)	2,371
Exercised (in shares)	(851)
Forfeited (in shares)	(99)
Outstanding, ending balance (in shares)	9,356	7,935
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 0.60
Granted (in dollars per share)	0.10
Exercised (in dollars per share)	0.36
Forfeited (in dollars per share)	0.10
Outstanding, ending balance (in dollars per share)	$ 0.50	$ 0.60
Outstanding, Weighted-Average Remaining Contractual Life (years)	7 years 10 months 24 days	7 years 6 months
Outstanding, Aggregate Intrinsic Value	$ 107,089	$ 108,138
Vested and exercisable, Stock Options (in shares)	3,172
Vested and exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 1.26
Vested and exercisable, Weighted-Average Remaining Contractual Life (years)	6 years
Vested and exercisable, Aggregate Intrinsic Value	$ 33,868