Allowance for Doubtful Accounts - Summary of the Activity in the Allowance for Doubtful Accounts (Detail) - Allowance for doubtful accounts [Member] - USD ($)	3 Months Ended
	Jul. 30, 2023	Jul. 31, 2022
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	$ 342,000	$ 292,000
Provision for bad debts	129,000	57,000
Write-offs, net of recoveries	(30,000)
Ending balance	$ 441,000	$ 349,000