Cash Equivalents and Marketable Securities - Cash Equivalents and Available-for-Sale Marketable Securities (Details) - USD ($) $ in Thousands	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Cash equivalents:
Amortized Cost	$ 164,358	$ 167,146	$ 284,829
Available-for-sale marketable securities:
Total cash equivalents and available-for-sale marketable securities, Amortized Cost	695,816	691,002
Total cash equivalents and available-for-sale marketable securities, Gross Unrealized Gain	663	69
Total cash equivalents and available-for-sale marketable securities, Gross Unrealized Loss	(140)	(630)
Total cash equivalents and available-for-sale marketable securities	696,339	690,441
Money market funds
Cash equivalents:
Amortized Cost	87,872	82,564
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	87,872	82,564
Commercial paper
Cash equivalents:
Amortized Cost	29,122	18,769
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	29,122	18,769
Available-for-sale marketable securities:
Amortized Cost	113,787	162,183
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	113,787	162,183
U.S. treasury securities
Cash equivalents:
Amortized Cost	0	5,888
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	0	5,888
Available-for-sale marketable securities:
Amortized Cost	15,478	2,497
Gross Unrealized Gains	4	0
Gross Unrealized Losses	0	0
Estimated Fair Value	15,482	2,497
Corporate debt securities
Cash equivalents:
Amortized Cost	1,015	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	1,015	0
Available-for-sale marketable securities:
Amortized Cost	315,034	310,557
Gross Unrealized Gains	502	64
Gross Unrealized Losses	(131)	(526)
Estimated Fair Value	315,405	310,095
Certificates of deposit
Available-for-sale marketable securities:
Amortized Cost	76,518	62,017
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	76,518	62,017
U.S. government agencies securities
Available-for-sale marketable securities:
Amortized Cost	56,990	46,527
Gross Unrealized Gains	157	5
Gross Unrealized Losses	(9)	(104)
Estimated Fair Value	$ 57,138	$ 46,428

Cash And Cash Equivalents, Accumulated Gross Unrealized Gain, Before Tax

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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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