CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK, REDEEMABLE CONVERTIBLE CLASS A-1 COMMON STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Amount	$ 989,477	$ 1,061,175	$ (182,697)
Repayment of Shareholder Loan			1,457
Conversion of redeemable convertible preferred stock to common stock upon initial public offering			418,553
Issuance of Class A common stock upon exercise of stock options (in shares)	1,332,000	4,651,000
Issuance of Class A common stock upon exercise of stock options	$ 4,653	$ 21,410	10,717
Vesting of early exercised Class A common stock options	1,006	2,745	2,869
Tax withholding related to net share settlement of equity awards	(6,940)
Vesting of restricted stock units	23,930
Issuance of Class A common stock under employee stock purchase plan	3,093
Repurchase and retirement of Class A common stock		(15,000)
Stock-based compensation expense	181,522	113,441	21,740
Other comprehensive income (loss)	1,763	(2,229)	(343)
Net loss	(268,839)	(192,065)	(55,696)
Ending Balance, Amount	$ 929,665	$ 989,477	1,061,175
Initial Public Offering and Private Placements
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon initial public offering and private placements, net of underwriting discounts			$ 844,575
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, shares (in shares)	106,225,000	102,167,000	31,210,000
Beginning Balance, Amount	$ 106	$ 102	$ 31
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)			43,796,000
Conversion of redeemable convertible preferred stock to common stock upon initial public offering			$ 44
Issuance of Class A common stock upon exercise of stock options (in shares)	1,309,000	4,515,000	5,765,000
Issuance of Class A common stock upon exercise of stock options	$ 1	$ 5	$ 6
Tax withholding related to net share settlement of equity awards (in shares)	(437,000)
Tax withholding related to net share settlement of equity awards	$ (1)
Vesting of restricted stock units (in shares)	6,535,000	264,000
Vesting of restricted stock units	$ 7
Issuance of Class A common stock under employee stock purchase plan (in shares)	311,000
Repurchase and retirement of Class A common stock (in shares)		(721,000)
Repurchase and retirement of Class A common stock		$ (1)
Ending Balance, shares (in shares)	113,943,000	106,225,000	102,167,000
Ending Balance, Amount	$ 113	$ 106	$ 102
Common Stock | Initial Public Offering and Private Placements
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon initial public offering and private placements, net of underwriting discounts (in shares)			21,396,000
Issuance of common stock upon initial public offering and private placements, net of underwriting discounts			$ 21
Additional Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Amount	1,532,917	1,410,325	110,485
Repayment of Shareholder Loan			1,457
Conversion of redeemable convertible preferred stock to common stock upon initial public offering			418,509
Issuance of Class A common stock upon exercise of stock options	4,652	21,405	10,711
Vesting of early exercised Class A common stock options	1,006	2,745	2,869
Tax withholding related to net share settlement of equity awards	(6,939)
Vesting of restricted stock units	23,923
Issuance of Class A common stock under employee stock purchase plan	3,093
Repurchase and retirement of Class A common stock		(14,999)
Stock-based compensation expense	181,522	113,441	21,740
Ending Balance, Amount	1,740,174	1,532,917	1,410,325
Additional Paid-In Capital | Initial Public Offering and Private Placements
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon initial public offering and private placements, net of underwriting discounts			844,554
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Amount	(2,148)	81	424
Other comprehensive income (loss)	1,763	(2,229)	(343)
Ending Balance, Amount	(385)	(2,148)	81
Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Amount	(541,398)	(349,333)	(293,637)
Net loss	(268,839)	(192,065)	(55,696)
Ending Balance, Amount	$ (810,237)	$ (541,398)	$ (349,333)
Redeemable Convertible Preferred Stock
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning Balance, shares (in shares)	0	0	37,129,000
Beginning Balance, Amount	$ 0	$ 0	$ 375,207
Repayment of Shareholder Loan			$ 24,546
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)			(37,129,000)
Conversion of redeemable convertible preferred stock to common stock upon initial public offering			$ (399,753)
Ending Balance, shares (in shares)	0	0	0
Ending Balance, Amount		$ 0	$ 0
Redeemable Convertible Common Class A-1 Stock
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning Balance, shares (in shares)	0	0	6,667,000
Beginning Balance, Amount	$ 0	$ 0	$ 18,800
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)			(6,667,000)
Conversion of redeemable convertible preferred stock to common stock upon initial public offering			$ (18,800)
Ending Balance, shares (in shares)	0	0	0
Ending Balance, Amount		$ 0	$ 0