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Investments - Schedule of Sales of Marketable Securities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 27, 2024 | Apr. 29, 2023 | Apr. 30, 2022
Sales of marketable securities |  |  |
Proceeds from sales | $ 23,328 | $ 24,483 | $ 35,116
Gross realized gains | 1,967 | 94 | 879
Gross realized losses | (768) | $ (242) | $ (402)
Fair value of available-for-sale securities by contractual maturity |  |  |
Within one year | 5,495 |  |
Securities not due at a single maturity date | 6,520 |  |
Total | $ 12,015 |  |

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