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Intangible Assets - Summary of Change in Carrying Amount of Finite-Lived Intangible Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 27, 2025
Apr. 28, 2024
Apr. 30, 2023
Customer Relationships [Member]      
Finite Lived Intangible Assets [Line Items]      
Beginning balance $ 1,035 $ 1,335 $ 1,636
Amortization expense (301) (300) (301)
Ending balance 734 1,035 1,335
Non-Compete Agreement [Member]      
Finite Lived Intangible Assets [Line Items]      
Beginning balance 301 377 452
Amortization expense (75) (76) (75)
Ending balance $ 226 $ 301 $ 377