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Accounts Receivable - Summary of the Activity in the Allowance for Doubtful Accounts (Detail) - Allowance for doubtful accounts [Member] - USD ($)
 12 Months Ended
Apr. 27, 2025
Apr. 28, 2024
Apr. 30, 2023
Valuation and Qualifying Accounts Disclosure [Line Items]      
beginning balance $ (356,000) $ (342,000) $ (292,000)
provision for bad debts (342,000) (276,000) (121,000)
write-offs, net of recoveries 47,000 262,000 71,000
ending balance $ (651,000) $ (356,000) $ (342,000)