Allowance for Doubtful Accounts - Summary of the Activity in the Allowance for Doubtful Accounts (Detail) - Allowance for doubtful accounts [Member] - USD ($)	6 Months Ended
	Oct. 30, 2022	Oct. 31, 2021
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	$ 292,000	$ 591,000
Provision for bad debts	49,000	(23,000)
Write-offs, net of recoveries	(53,000)	(34,000)
Ending balance	$ 288,000	$ 534,000