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, 2021			102,167
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, net of repurchases (in shares)			4,064
Issuance of Class A common stock upon exercise of stock options, net of repurchases	19,818		$ 4		19,814
Vesting of early exercised Class A common stock options	2,391				2,391
Vesting of restricted stock units (in shares)				54
Stock-based compensation expense	77,813				77,813
Other comprehensive gain (loss)	(877)						(877)
Net loss	(133,645)							(133,645)
Ending Balance, shares (in shares) at Jan. 31, 2022			106,285
Ending Balance, Amount at Jan. 31, 2022	1,026,675		$ 106		1,510,343		(796)	(482,978)
Beginning Balance, shares (in shares) at Oct. 31, 2021			104,871
Beginning Balance, Amount at Oct. 31, 2021	1,026,510		$ 105		1,470,176		(240)	(443,531)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options, net of repurchases (in shares)			1,397
Issuance of Class A common stock upon exercise of stock options, net of repurchases	8,324		$ 1		8,323
Vesting of early exercised Class A common stock options	483				483
Vesting of restricted stock units (in shares)				17
Stock-based compensation expense	31,361				31,361
Other comprehensive gain (loss)	(556)						(556)
Net loss	(39,447)							(39,447)
Ending Balance, shares (in shares) at Jan. 31, 2022			106,285
Ending Balance, Amount at Jan. 31, 2022	1,026,675		$ 106		1,510,343		(796)	(482,978)
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)	758		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
Tax withholding related to net share settlement of equity awards (in shares)			(336)
Tax withholding 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 gain (loss)	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
Tax withholding related to net share settlement of equity awards (in shares)			(115)
Tax withholding 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 gain (loss)	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)