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General and Summary of Significant Accounting Policies - Summary of Foreign Currency Exchange Rate Gains (Losses) by Geographic Area (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 27, 2025 | Apr. 28, 2024 | Apr. 30, 2023
Foreign Currency Exchange Rate Gain and Loss [Line Items] |  |  |
Foreign currency exchange rate gains (losses) | $ 117 | $ 545 | $ 500
China [Member] |  |  |
Foreign Currency Exchange Rate Gain and Loss [Line Items] |  |  |
Foreign currency exchange rate gains (losses) | 141 | 604 | 588
Canada [Member] |  |  |
Foreign Currency Exchange Rate Gain and Loss [Line Items] |  |  |
Foreign currency exchange rate gains (losses) | (23) | (58) | $ (88)
Vietnam [Member] |  |  |
Foreign Currency Exchange Rate Gain and Loss [Line Items] |  |  |
Foreign currency exchange rate gains (losses) | $ (1) | $ (1) |

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