Cash Equivalents and Marketable Securities - Available-for-Sale Marketable Securities, Fair Value and Unrealized Losses Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jan. 31, 2025	Apr. 30, 2024
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	$ (474)	$ (590)
AFS, Less Than 12 Months, Fair Value	60,061	237,352
AFS, 12 Months or Greater, Unrealized Losses	0	(40)
AFS, 12 Months or Greater, Fair Value	0	35,407
AFS, Total Unrealized Losses	(474)	(630)
AFS, Total Fair Value	60,061	272,759
U.S. treasury securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses		0
AFS, Less Than 12 Months, Fair Value		2,497
AFS, 12 Months or Greater, Unrealized Losses		0
AFS, 12 Months or Greater, Fair Value		0
AFS, Total Unrealized Losses		0
AFS, Total Fair Value		2,497
U.S. government agencies securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	(155)	(99)
AFS, Less Than 12 Months, Fair Value	18,817	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	(155)	(105)
AFS, Total Fair Value	18,817	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	3,517	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	3,517	4,058
Corporate debt securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	(319)	(491)
AFS, Less Than 12 Months, Fair Value	37,727	196,907
AFS, 12 Months or Greater, Unrealized Losses	0	(34)
AFS, 12 Months or Greater, Fair Value	0	27,658
AFS, Total Unrealized Losses	(319)	(525)
AFS, Total Fair Value	$ 37,727	$ 224,565

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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