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 Loss	Accumulated Deficit
Beginning Balance, shares (in shares) at Apr. 30, 2022			106,225
Beginning Balance, Amount at Apr. 30, 2022	$ 989,477		$ 106		$ 1,532,917		$ (2,148)	$ (541,398)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options, net of repurchases (in shares)			568
Issuance of Class A common stock upon exercise of stock options, net of repurchases	1,800		$ 1		1,799
Vesting of early exercised Class A common stock options	551				551
Shares withheld related to net share settlement of equity awards (in shares)			(221)
Shares withheld related to net share settlement of equity awards	(3,375)				(3,375)
Vesting of restricted stock units (in shares)				3,529
Vesting of restricted stock units		$ 13,672		$ 3		$ 13,669
Stock-based compensation expense	92,419				92,419
Other comprehensive loss	(657)						(657)
Net loss	(140,721)							(140,721)
Ending Balance, shares (in shares) at Oct. 31, 2022			110,101
Ending Balance, Amount at Oct. 31, 2022	953,166		$ 110		1,637,980		(2,805)	(682,119)
Beginning Balance, shares (in shares) at Jul. 31, 2022			108,344
Beginning Balance, Amount at Jul. 31, 2022	978,978		$ 108		1,594,487		(2,348)	(613,269)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options, net of repurchases (in shares)			289
Issuance of Class A common stock upon exercise of stock options, net of repurchases	697				697
Vesting of early exercised Class A common stock options	219				219
Shares withheld related to net share settlement of equity awards (in shares)			(221)
Shares withheld related to net share settlement of equity awards	(3,375)				(3,375)
Vesting of restricted stock units (in shares)				1,689
Vesting of restricted stock units		2		$ 2
Stock-based compensation expense	45,952				45,952
Other comprehensive loss	(457)						(457)
Net loss	(68,850)							(68,850)
Ending Balance, shares (in shares) at Oct. 31, 2022			110,101
Ending Balance, Amount at Oct. 31, 2022	953,166		$ 110		1,637,980		(2,805)	(682,119)
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		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 loss	(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				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 loss	(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)