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Income Taxes - Unrecognized Tax Benefit (Detail) - USD ($) | 12 Months Ended
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Apr. 27, 2025 | Apr. 28, 2024 | Apr. 30, 2023
Income Tax Disclosure [Abstract] |  |  |
beginning balance | $ 1,258,000 | $ 1,179,000 | $ 1,101,000
increases from prior period tax positions | 224,000 | 197,000 | 175,000
decreases from prior period tax positions | (76,000) | (118,000) | (97,000)
lapse of applicable statute of limitations | (616,000) | 0 | 0
ending balance | $ 790,000 | $ 1,258,000 | $ 1,179,000

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