Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Jul. 31, 2025	Apr. 30, 2024	Apr. 30, 2025
Number of Stock Options Outstanding
Balance at beginning of period (in shares)	28,477
Options granted (in shares)	55
Options exercised (in shares)	(267)
Options cancelled (in shares)	(49)
Balance at end of period (in shares)	28,216
Vested and exercisable at end of period (in shares)	24,619
Vested and expected to vest at end of period (in shares)	28,216
Weighted Average Exercise Price
Balance at beginning of period (in dollars per share)	$ 15.13
Options granted (in dollars per share)	24.72
Options exercised (in dollars per share)	4.85
Options cancelled (in dollars per share)	36.95
Balance at end of period (in dollars per share)	15.21
Vested and exercisable at end of period (in dollars per share)	12.92
Vested and expected to vest at end of period (in dollars per share)	$ 15.21
Weighted Average Remaining Contractual Life (years)
Balance at beginning of period	4 years 9 months 14 days	5 years 3 days
Balance at end of period	4 years 9 months 14 days	5 years 3 days
Vested and exercisable at end of period	4 years 4 months 28 days
Vested and expected to vest at end of period	4 years 9 months 14 days
Aggregate Intrinsic Value
Balance at beginning of period	$ 235,602		$ 195,923
Balance at end of period	235,602		$ 195,923
Vested and exercisable at end of period	261,947
Vested and expected to vest at end of period	$ 235,602