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, 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)			747
Issuance of Class A common stock upon exercise of stock options, net of repurchases	2,387		$ 1		2,386
Vesting of early exercised Class A common stock options	842				842
Shares withheld related to net share settlement of equity awards (in shares)			(336)
Shares withheld related to net share settlement of equity awards	(4,815)				(4,815)
Vesting of restricted stock units (in shares)				5,373
Vesting of restricted stock units		$ 23,928		$ 5		$ 23,923
Stock-based compensation expense	138,321				138,321
Other comprehensive income	1,113						1,113
Net loss	(203,883)							(203,883)
Ending Balance, shares (in shares) at Jan. 31, 2023			112,009
Ending Balance, Amount at Jan. 31, 2023	947,370		$ 112		1,693,574		(1,035)	(745,281)
Beginning Balance, shares (in shares) at Oct. 31, 2022			110,101
Beginning Balance, Amount at Oct. 31, 2022	953,166		$ 110		1,637,980		(2,805)	(682,119)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options, net of repurchases (in shares)			180
Issuance of Class A common stock upon exercise of stock options, net of repurchases	590				590
Vesting of early exercised Class A common stock options	286				286
Shares withheld related to net share settlement of equity awards (in shares)			(115)
Shares withheld related to net share settlement of equity awards	(1,440)				(1,440)
Vesting of restricted stock units (in shares)				1,843
Vesting of restricted stock units		10,255		$ 2		10,253
Stock-based compensation expense	45,905				45,905
Other comprehensive income	1,770						1,770
Net loss	(63,162)							(63,162)
Ending Balance, shares (in shares) at Jan. 31, 2023			112,009
Ending Balance, Amount at Jan. 31, 2023	947,370		$ 112		1,693,574		(1,035)	(745,281)
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)	2,535		2,534
Issuance of Class A common stock upon exercise of stock options, net of repurchases	$ 11,319		$ 2		11,317
Vesting of early exercised Class A common stock options	406				406
Shares withheld related to net share settlement of equity awards (in shares)			(283)
Shares withheld related to net share settlement of equity awards	(10,485)				(10,485)
Vesting of restricted stock units (in shares)				5,004
Vesting of restricted stock units		34,475		$ 5		34,470
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	133,514				133,514
Other comprehensive income	815						815
Net loss	(206,769)							(206,769)
Ending Balance, shares (in shares) at Jan. 31, 2024			121,627
Ending Balance, Amount at Jan. 31, 2024	897,995		$ 121		1,914,450		430	(1,017,006)
Beginning Balance, shares (in shares) at Oct. 31, 2023			119,653
Beginning Balance, Amount at Oct. 31, 2023	911,276		$ 119		1,856,307		(775)	(944,375)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options, net of repurchases (in shares)			283
Issuance of Class A common stock upon exercise of stock options, net of repurchases	1,209				1,209
Vesting of early exercised Class A common stock options	112				112
Shares withheld related to net share settlement of equity awards (in shares)			(30)
Shares withheld related to net share settlement of equity awards	(720)				(720)
Vesting of restricted stock units (in shares)				1,721
Vesting of restricted stock units		$ 13,006		$ 2		$ 13,004
Stock-based compensation expense	44,538				44,538
Other comprehensive income	1,205						1,205
Net loss	(72,631)							(72,631)
Ending Balance, shares (in shares) at Jan. 31, 2024			121,627
Ending Balance, Amount at Jan. 31, 2024	$ 897,995		$ 121		$ 1,914,450		$ 430	$ (1,017,006)