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Investments - Schedule of Sales and Maturities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 25, 2025	Jan. 27, 2024	Jan. 25, 2025	Jan. 27, 2024
Sales of Marketable Securities
Proceeds from sales	$ 1,490	$ 1,381	$ 11,715	$ 21,849
Gross realized gains	85	33	518	1,909
Gross realized losses	0	$ 0	(35)	$ (740)
Fair Value of Available-For-Sale Securities By Contractual Maturity
Debt securities with no single maturity	$ 6,300		$ 6,300

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