Investments - Schedule of Sales of Marketable Securities (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 29, 2023	Apr. 30, 2022	Apr. 24, 2021
Sales of marketable securities
Proceeds from sales	$ 24,483	$ 35,116	$ 33,631
Gross realized gains	94	879	1,026
Gross realized losses	(242)	$ (402)	$ (71)
Fair value of available-for-sale securities by contractual maturity
Within one year	5,038
Within two to five years	6,612
Within six to ten years	674
Thereafter	1,715
Total	$ 14,039

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of realized gain 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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Amount of cash inflow from sale of 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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