Accounts Receivable - Summary of Accounts Receivable (Detail) - USD ($)	Apr. 28, 2024	Apr. 30, 2023	May 01, 2022	May 02, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
customers	$ 21,660,000	$ 25,244,000
Accounts receivable, net	21,138,000	24,778,000
Allowance for doubtful accounts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Valuation allowance, balance	(356,000)	(342,000)	$ (292,000)	$ (591,000)
Allowance for cash discounts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Valuation allowance, balance	(113,000)	(96,000)
Allowance for sales returns and allowances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Valuation allowance, balance	$ (53,000)	$ (28,000)