Accounts Receivable - Summary of the Activity in the Allowance for Doubtful Accounts (Detail) - Allowance for doubtful accounts [Member] - USD ($)	12 Months Ended
	Apr. 28, 2024	Apr. 30, 2023	May 01, 2022
Valuation and Qualifying Accounts Disclosure [Line Items]
beginning balance	$ (342,000)	$ (292,000)	$ (591,000)
provision for bad debts	(276,000)	(121,000)	74,000
write-offs, net of recoveries	262,000	71,000	225,000
ending balance	$ (356,000)	$ (342,000)	$ (292,000)