Stock-Based Compensation - Stock Option Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Jan. 31, 2026 USD ($) $ / shares shares	Apr. 30, 2025 USD ($) $ / shares shares
Number of Stock Options Outstanding
Balance at beginning of period (in shares) | shares	28,477
Options granted (in shares) | shares	2,769
Options exercised (in shares) | shares	(986)
Options cancelled (in shares) | shares	(142)
Balance at end of period (in shares) | shares	30,118	28,477
Vested and exercisable at end of period (in shares) | shares	25,291
Vested and expected to vest at end of period (in shares) | shares	30,118
Weighted Average Exercise Price
Balance at beginning of period (in dollars per share) | $ / shares	$ 15.13
Options granted (in dollars per share) | $ / shares	17.80
Options exercised (in dollars per share) | $ / shares	4.28
Options cancelled (in dollars per share) | $ / shares	35.19
Balance at end of period (in dollars per share) | $ / shares	15.64	$ 15.13
Vested and exercisable at end of period (in dollars per share) | $ / shares	13.96
Vested and expected to vest at end of period (in dollars per share) | $ / shares	$ 15.64
Weighted Average Remaining Contractual Life (years)
Balance at beginning of period	4 years 9 months 18 days	5 years 3 days
Balance at end of period	4 years 9 months 18 days	5 years 3 days
Vested and exercisable at end of period	4 years 1 month 2 days
Vested and expected to vest at end of period	4 years 9 months 18 days
Aggregate Intrinsic Value
Balance at beginning of period | $	$ 0	$ 195,923
Balance at end of period | $	0	$ 195,923
Vested and exercisable at end of period | $	0
Vested and expected to vest at end of period | $	$ 0