Exit and Disposal Activity - Summary of Activity in Accrued Restructuring (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Oct. 30, 2022	Oct. 30, 2022
Restructuring Cost and Reserve [Line Items]
Accrual established in fiscal 2023 / Expenses incurred	$ 615,000	$ 615,000
Exit and Disposal Activity [Member]
Restructuring Cost and Reserve [Line Items]
Accrual established in fiscal 2023 / Expenses incurred		515,000
Payments		(502,000)
Restructuring Reserve, Ending Balance	33,000	33,000
Employee Termination Benefits [Member] | Exit and Disposal Activity [Member]
Restructuring Cost and Reserve [Line Items]
Accrual established in fiscal 2023 / Expenses incurred		468,000
Payments		(468,000)
Lease Termination Costs [Member] | Exit and Disposal Activity [Member]
Restructuring Cost and Reserve [Line Items]
Accrual established in fiscal 2023 / Expenses incurred		47,000
Payments		(16,000)
Restructuring Reserve, Ending Balance	31,000	31,000
Other Associated Costs [Member] | Exit and Disposal Activity [Member]
Restructuring Cost and Reserve [Line Items]
Accrual established in fiscal 2023 / Expenses incurred		20,000
Payments		(18,000)
Restructuring Reserve, Ending Balance	$ 2,000	$ 2,000