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General and Summary of Significant Accounting Policies - Summary of Foreign Currency Exchange Gains (Losses) by Geographic Area (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 28, 2024 | Apr. 30, 2023 | May 01, 2022
Foreign Currency Exchange Gain And Loss [Line Items] |  |  |
Foreign currency exchange gains (losses) | $ 545 | $ 500 | $ (132)
China [Member] |  |  |
Foreign Currency Exchange Gain And Loss [Line Items] |  |  |
Foreign currency exchange gains (losses) | 604 | 588 | (104)
Canada [Member] |  |  |
Foreign Currency Exchange Gain And Loss [Line Items] |  |  |
Foreign currency exchange gains (losses) | (58) | $ (88) | $ (28)
Vietnam [Member] |  |  |
Foreign Currency Exchange Gain And Loss [Line Items] |  |  |
Foreign currency exchange gains (losses) | $ (1) |  |

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