CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive (Loss) Income	Accumulated Deficit
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
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)
Beginning Balance, shares (in shares) at Apr. 30, 2025		133,938
Beginning Balance, Amount at Apr. 30, 2025	$ 838,303	$ 133	2,216,284	521	(1,378,635)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options, net of repurchases (in shares)	443	443
Issuance of Class A common stock upon exercise of stock options, net of repurchases	$ 2,979	$ 1	2,978
Vesting of early exercised Class A common stock options	7		7
Vesting of restricted stock units (in shares)		5,466
Vesting of restricted stock units	31,135	$ 6	31,129
Issuance of Class A common stock under employee stock purchase plan (in shares)		334
Issuance of Class A common stock under employee stock purchase plan	4,978		4,978
Stock-based compensation expense	115,658		115,658
Other comprehensive income	262			262
Net loss	(221,437)				(221,437)
Ending Balance, shares (in shares) at Oct. 31, 2025		140,181
Ending Balance, Amount at Oct. 31, 2025	771,885	$ 140	2,371,034	783	(1,600,072)
Beginning Balance, shares (in shares) at Jul. 31, 2025		136,861
Beginning Balance, Amount at Jul. 31, 2025	798,824	$ 137	2,294,166	(74)	(1,495,404)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options, net of repurchases (in shares)		177
Issuance of Class A common stock upon exercise of stock options, net of repurchases	1,692		1,692
Vesting of early exercised Class A common stock options	2		2
Vesting of restricted stock units (in shares)		2,809
Vesting of restricted stock units	9,094	$ 3	9,091
Issuance of Class A common stock under employee stock purchase plan (in shares)		334
Issuance of Class A common stock under employee stock purchase plan	4,978		4,978
Stock-based compensation expense	61,105		61,105
Other comprehensive income	857			857
Net loss	(104,668)				(104,668)
Ending Balance, shares (in shares) at Oct. 31, 2025		140,181
Ending Balance, Amount at Oct. 31, 2025	$ 771,885	$ 140	$ 2,371,034	$ 783	$ (1,600,072)