Cash Equivalents and Marketable Securities - Available-for-Sale Marketable Securities, Fair Value and Unrealized Losses Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jul. 31, 2026	Apr. 30, 2026
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	$ (527)	$ (211)
AFS, Less Than 12 Months, Fair Value	173,943	97,357
AFS, 12 Months or Greater, Unrealized Losses	(137)	(81)
AFS, 12 Months or Greater, Fair Value	58,380	32,551
AFS, Total Unrealized Losses	(664)	(292)
AFS, Total Fair Value	232,323	129,908
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	3,880	0
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	3,880	0
U.S. government agencies securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	(206)	(66)
AFS, Less Than 12 Months, Fair Value	40,546	17,919
AFS, 12 Months or Greater, Unrealized Losses	(33)	(14)
AFS, 12 Months or Greater, Fair Value	18,517	11,221
AFS, Total Unrealized Losses	(239)	(80)
AFS, Total Fair Value	59,063	29,140
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	4,842	0
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	4,842	0
Corporate debt securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	(321)	(145)
AFS, Less Than 12 Months, Fair Value	124,675	79,438
AFS, 12 Months or Greater, Unrealized Losses	(104)	(67)
AFS, 12 Months or Greater, Fair Value	39,863	21,330
AFS, Total Unrealized Losses	(425)	(212)
AFS, Total Fair Value	$ 164,538	$ 100,768

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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