Lines of Credit - Narrative (Detail) ¥ in Millions		3 Months Ended
	Jan. 19, 2023 USD ($)	Jul. 30, 2023 USD ($)	Jul. 31, 2022 USD ($)	Jul. 30, 2023 CNY (¥)	Apr. 30, 2023 USD ($)
Revolving Credit Facility [Member] | United States [Member]
Line Of Credit Facility [Line Items]
Applicable interest rate at end of period		6.56%	2.88%	6.56%	6.30%
Reference rate on which the interest rate is based		SOFR
Letters of credit, outstanding amount		$ 275,000	$ 275,000		$ 275,000
Line of credit facility, available borrowing		25,500,000
Outstanding amount		0	0		0
Interest paid during the year		$ 0	8,000
Revolving Credit Facility [Member] | United States [Member] | ABL Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	$ 35,000,000.0
Expiration date	Jan. 19, 2026
Maximum amount of letters of credit	$ 1,000,000
Line of credit facility, accounts receivable, borrowing base percentage	85.00%
Line of credit facility, borrowing base percentage of eligible inventory value	65.00%
Line of credit facility, borrowing base percentage of net-orderly-liquidation value of eligible inventory value	85.00%
Line of credit facility, borrowing base percentage of eligible in-transit inventory value	65.00%
Line of credit facility, borrowing base percentage of net-orderly-liquidation value of eligible in-transit inventory value	85.00%
Line of credit facility, borrowing base percentage of eligible raw material inventory value	65.00%
Line of credit facility, borrowing base percentage of net-orderly-liquidation value of eligible raw material inventory value	85.00%
Line of credit facility, borrowing base eligible in-transit inventory value	$ 5,000,000
Line of credit stated amount to determine borrowing base	22,500,000
Debt instrument, interest rate terms		The ABL Facility permits both base rate borrowings and borrowings based upon daily simple SOFR (the secured overnight financing rate administered by the Federal Reserve Bank of New York (or its successor)). Borrowings under the ABL Facility bear interest at an annual rate equal to daily simple SOFR plus 150 basis points (if the average monthly excess availability under the ABL Facility is greater than 50%) or 175 basis points (if the average monthly excess availability under the ABL Facility is less than or equal to 50%) or 50 basis points above base rate (if the average monthly excess availability under the ABL Facility is greater than 50%) or 75 basis points above base rate (if the average monthly excess availability under the ABL Facility is less than or equal to 50%), as applicable, with a fee on unutilized commitments at an annual rate of 37.5 basis points and an annual servicing fee of $12,000.
Annual servicing fee	$ 12,000
Line of credit facility, equal to eligible accounts receivable, borrowing base percent	200.00%
Threshold amount to determine excess borrowing availability	$ 35,000,000
Number of consecutive days in which if no event of default occurs, the compliance period ends	60 days
Line of credit facility, fixed charge ratio	1.1
Line of credit facility, commitment fee percentage	37.50%
Revolving Credit Facility [Member] | United States [Member] | Letters of Credit [Member]
Line Of Credit Facility [Line Items]
Remaining letters of credit		$ 725,000
Revolving Credit Facility [Member] | Minimum [Member] | United States [Member] | ABL Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Line of credit facility, excess borrowing ability	$ 7,000,000
Line of credit facility, covenant, excess borrowing availability	$ 5,250,000
Revolving Credit Facility [Member] | Minimum [Member] | United States [Member] | Base Rate [Member] | ABL Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on interest rate	50.00%
Revolving Credit Facility [Member] | Minimum [Member] | United States [Member] | SOFR [Member] | ABL Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on interest rate	150.00%
Revolving Credit Facility [Member] | Maximum [Member] | United States [Member] | ABL Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Line of credit facility minimum excess borrowing ability cash dominion period	$ 7,000,000
Line of credit facility, minimum excess borrowing ability compliance period	$ 5,250,000
Revolving Credit Facility [Member] | Maximum [Member] | United States [Member] | Base Rate [Member] | ABL Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on interest rate	75.00%
Revolving Credit Facility [Member] | Maximum [Member] | United States [Member] | SOFR [Member] | ABL Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on interest rate	175.00%
Revolving credit agreements [Member] | China [Member] | Chinese Yuan Renminbi [Member]
Line Of Credit Facility [Line Items]
Maximum borrowing capacity | ¥				¥ 40
Expiration date		Nov. 24, 2023
Interest rate description		Interest charged under this agreement is based on an interest rate determined by the Chinese government at the time of borrowing. The agreement
Outstanding amount		$ 0	$ 0		$ 0
Revolving credit agreements [Member] | China [Member] | United States Dollar [Member]
Line Of Credit Facility [Line Items]
Maximum borrowing capacity		$ 5,600,000