CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	RSUs	Common Stock	Common Stock RSUs	Additional Paid-In Capital	Additional Paid-In Capital RSUs	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning Balance, shares (in shares) at Apr. 30, 2023			113,943
Beginning Balance, Amount at Apr. 30, 2023	$ 929,665		$ 113		$ 1,740,174		$ (385)	$ (810,237)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options, net of repurchases (in shares)			2,251
Issuance of Class A common stock upon exercise of stock options, net of repurchases	10,110		$ 2		10,108
Vesting of early exercised Class A common stock options	294				294
Shares withheld related to net share settlement of equity awards (in shares)			(253)
Shares withheld related to net share settlement of equity awards	(9,765)				(9,765)
Vesting of restricted stock units (in shares)				3,283
Vesting of restricted stock units		$ 21,469		$ 3		$ 21,466
Issuance of Class A common stock under employee stock purchase plan (in shares)			429
Issuance of Class A common stock under employee stock purchase plan	5,055		$ 1		5,054
Stock-based compensation expense	88,976				88,976
Other comprehensive income	(390)						(390)
Net loss	(134,138)							(134,138)
Ending Balance, shares (in shares) at Oct. 31, 2023			119,653
Ending Balance, Amount at Oct. 31, 2023	911,276		$ 119		1,856,307		(775)	(944,375)
Beginning Balance, shares (in shares) at Jul. 31, 2023			117,925
Beginning Balance, Amount at Jul. 31, 2023	932,442		$ 117		1,807,678		(758)	(874,595)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options, net of repurchases (in shares)			165
Issuance of Class A common stock upon exercise of stock options, net of repurchases	537		$ 0		537
Vesting of early exercised Class A common stock options	144				144
Shares withheld related to net share settlement of equity awards (in shares)			(81)
Shares withheld related to net share settlement of equity awards	(2,647)				(2,647)
Vesting of restricted stock units (in shares)				1,215
Vesting of restricted stock units		1		$ 1
Issuance of Class A common stock under employee stock purchase plan (in shares)			429
Issuance of Class A common stock under employee stock purchase plan	5,055		$ 1		5,054
Stock-based compensation expense	45,541				45,541
Other comprehensive income	(17)						(17)
Net loss	(69,780)							(69,780)
Ending Balance, shares (in shares) at Oct. 31, 2023			119,653
Ending Balance, Amount at Oct. 31, 2023	911,276		$ 119		1,856,307		(775)	(944,375)
Beginning Balance, shares (in shares) at Apr. 30, 2024			123,706
Beginning Balance, Amount at Apr. 30, 2024	$ 873,353		$ 123		1,963,726		(563)	(1,089,933)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options, net of repurchases (in shares)	1,064		1,064
Issuance of Class A common stock upon exercise of stock options, net of repurchases	$ 4,468		$ 1		4,467
Vesting of early exercised Class A common stock options	216				216
Shares withheld related to net share settlement of equity awards (in shares)			(225)
Shares withheld related to net share settlement of equity awards	(5,787)				(5,787)
Vesting of restricted stock units (in shares)				3,858
Vesting of restricted stock units		23,532		$ 4		23,528
Issuance of Class A common stock under employee stock purchase plan (in shares)			378
Issuance of Class A common stock under employee stock purchase plan	5,009				5,009
Stock-based compensation expense	85,885				85,885
Other comprehensive income	1,084						1,084
Net loss	(128,799)							(128,799)
Ending Balance, shares (in shares) at Oct. 31, 2024			128,781
Ending Balance, Amount at Oct. 31, 2024	858,961		$ 128		2,077,044		521	(1,218,732)
Beginning Balance, shares (in shares) at Jul. 31, 2024			126,205
Beginning Balance, Amount at Jul. 31, 2024	874,921		$ 126		2,027,274		281	(1,152,760)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options, net of repurchases (in shares)			634
Issuance of Class A common stock upon exercise of stock options, net of repurchases	1,342				1,342
Vesting of early exercised Class A common stock options	110				110
Shares withheld related to net share settlement of equity awards (in shares)			(118)
Shares withheld related to net share settlement of equity awards	(2,841)				(2,841)
Vesting of restricted stock units (in shares)				1,682
Vesting of restricted stock units		$ 1,252		$ 2		$ 1,250
Issuance of Class A common stock under employee stock purchase plan (in shares)			378
Issuance of Class A common stock under employee stock purchase plan	5,009				5,009
Stock-based compensation expense	44,900				44,900
Other comprehensive income	240						240
Net loss	(65,972)							(65,972)
Ending Balance, shares (in shares) at Oct. 31, 2024			128,781
Ending Balance, Amount at Oct. 31, 2024	$ 858,961		$ 128		$ 2,077,044		$ 521	$ (1,218,732)