Investments - Schedule of Sales and Maturities (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Oct. 26, 2024	Oct. 28, 2023	Oct. 26, 2024	Oct. 28, 2023
Sales of Marketable Securities
Proceeds from sales	$ 2,346	$ 8,064	$ 10,225	$ 20,468
Gross realized gains	318	1,715	433	1,876
Gross realized losses	0	$ (272)	(35)	$ (740)
Fair Value of Available-For-Sale Securities By Contractual Maturity
Within one year	994		994
Securities not due at a single maturity date	6,451		6,451
Total	$ 7,445		$ 7,445

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