Cash Equivalents and Marketable Securities - Summary of Fair Values and Unrealized Losses of Available-For-Sale Marketable Securities In Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Apr. 30, 2025	Apr. 30, 2024
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	$ (138)	$ (590)
AFS, Less Than 12 Months, Fair Value	75,163	237,352
AFS, 12 Months or Greater, Unrealized Losses	(2)	(40)
AFS, 12 Months or Greater, Fair Value	9,847	35,407
AFS, Total Unrealized Losses	(140)	(630)
AFS, Total Fair Value	85,010	272,759
U.S. treasury securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	0	0
AFS, Less Than 12 Months, Fair Value	2,468	2,497
AFS, 12 Months or Greater, Unrealized Losses	0	0
AFS, 12 Months or Greater, Fair Value	0	0
AFS, Total Unrealized Losses	0	0
AFS, Total Fair Value	2,468	2,497
U.S. government agencies securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	(9)	(99)
AFS, Less Than 12 Months, Fair Value	7,973	33,890
AFS, 12 Months or Greater, Unrealized Losses	0	(6)
AFS, 12 Months or Greater, Fair Value	0	7,749
AFS, Total Unrealized Losses	(9)	(105)
AFS, Total Fair Value	7,973	41,639
Commercial paper
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	0	0
AFS, Less Than 12 Months, Fair Value	1,823	4,058
AFS, 12 Months or Greater, Unrealized Losses	0	0
AFS, 12 Months or Greater, Fair Value	0	0
AFS, Total Unrealized Losses	0	0
AFS, Total Fair Value	1,823	4,058
Corporate debt securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	(129)	(491)
AFS, Less Than 12 Months, Fair Value	62,899	196,907
AFS, 12 Months or Greater, Unrealized Losses	(2)	(34)
AFS, 12 Months or Greater, Fair Value	9,847	27,658
AFS, Total Unrealized Losses	(131)	(525)
AFS, Total Fair Value	$ 72,746	$ 224,565