CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ 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, 2021			102,167,000
Beginning Balance, Amount at Apr. 30, 2021	$ 1,061,175		$ 102		$ 1,410,325		$ 81	$ (349,333)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options (in shares)			4,515,000
Issuance of Class A common stock upon exercise of stock options	21,410		$ 5		21,405
Vesting of early exercised Class A common stock options	2,745				2,745
Vesting of restricted stock units (in shares)				264,000
Repurchase and retirement of Class A common stock (in shares)			(721,000)
Repurchase and retirement of Class A common stock	(15,000)		$ (1)		(14,999)
Stock-based compensation expense	113,441				113,441
Other comprehensive income (loss)	(2,229)						(2,229)
Net loss	(192,065)							(192,065)
Ending Balance, shares (in shares) at Apr. 30, 2022			106,225,000
Ending 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 (in shares)	1,332,000		1,309,000
Issuance of Class A common stock upon exercise of stock options	$ 4,653		$ 1		4,652
Vesting of early exercised Class A common stock options	1,006				1,006
Tax withholding related to net share settlement of equity awards (in shares)			(437,000)
Tax withholding related to net share settlement of equity awards	(6,940)		$ (1)		(6,939)
Vesting of restricted stock units (in shares)				6,535,000
Vesting of restricted stock units		$ 23,930		$ 7		$ 23,923
Issuance of Class A common stock under employee stock purchase plan (in shares)			311,000
Issuance of Class A common stock under employee stock purchase plan	3,093				3,093
Stock-based compensation expense	181,522				181,522
Other comprehensive income (loss)	1,763						1,763
Net loss	(268,839)							(268,839)
Ending Balance, shares (in shares) at Apr. 30, 2023			113,943,000
Ending 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 (in shares)	3,033,000		3,028,000
Issuance of Class A common stock upon exercise of stock options	$ 13,710		$ 3		13,707
Vesting of early exercised Class A common stock options	507				507
Tax withholding related to net share settlement of equity awards (in shares)			(376,000)
Tax withholding related to net share settlement of equity awards	(13,220)				(13,220)
Vesting of restricted stock units (in shares)				6,248,000
Vesting of restricted stock units		$ 34,833		$ 6		$ 34,827
Issuance of Class A common stock under employee stock purchase plan (in shares)			863,000
Issuance of Class A common stock under employee stock purchase plan	10,764		$ 1		10,763
Stock-based compensation expense	176,968				176,968
Other comprehensive income (loss)	(178)						(178)
Net loss	(279,696)							(279,696)
Ending Balance, shares (in shares) at Apr. 30, 2024			123,706,000
Ending Balance, Amount at Apr. 30, 2024	$ 873,353		$ 123		$ 1,963,726		$ (563)	$ (1,089,933)