Cash Equivalents and Marketable Securities - Available-for-Sale Marketable Securities (Details) - USD ($) $ in Thousands	Oct. 31, 2024	Apr. 30, 2024	Oct. 31, 2023
Cash equivalents:
Amortized Cost	$ 121,274	$ 167,146	$ 149,009
Debt Securities, Available-for-Sale [Abstract]
Total cash equivalents and available-for-sale marketable securities, Amortized Cost	678,812	691,002
Total cash equivalents and available-for-sale marketable securities, Gross Unrealized Gain	961	69
Total cash equivalents and available-for-sale marketable securities, Gross Unrealized Loss	(438)	(630)
Total cash equivalents and available-for-sale marketable securities	679,335	690,441
Money market funds
Cash equivalents:
Amortized Cost	61,121	82,564
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	61,121	82,564
Commercial paper
Cash equivalents:
Amortized Cost	8,115	18,769
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	8,115	18,769
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	113,959	162,183
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	113,959	162,183
U.S. treasury securities
Cash equivalents:
Amortized Cost	999	5,888
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	999	5,888
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	13,328	2,497
Gross Unrealized Gains	14	0
Gross Unrealized Losses	(1)	0
Estimated Fair Value	13,341	2,497
Corporate debt securities
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	346,881	310,557
Gross Unrealized Gains	826	64
Gross Unrealized Losses	(286)	(526)
Estimated Fair Value	347,421	310,095
Certificates of deposit
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	68,715	62,017
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	68,715	62,017
U.S. government agencies securities
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	65,694	46,527
Gross Unrealized Gains	121	5
Gross Unrealized Losses	(151)	(104)
Estimated Fair Value	$ 65,664	$ 46,428

Cash And Cash Equivalents Accumulated Gross Unrealized Gain Before Tax

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Cash, Cash Equivalents And Available-for-sale Debt Securities, Amortized Cost

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Fair value portion of asset recognized for present right to economic benefit.

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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