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Lines of Credit - Narrative (Detail)
 12 Months Ended
Nov. 06, 2025
Jul. 28, 2025
USD ($)
Apr. 27, 2025
USD ($)
Mar. 05, 2025
CNY (¥)
Nov. 05, 2024
CNY (¥)
Apr. 27, 2025
USD ($)
Apr. 28, 2024
USD ($)
Apr. 30, 2023
USD ($)
Jul. 28, 2025
CNY (¥)
Apr. 27, 2025
CNY (¥)
Line Of Credit Facility [Line Items]                    
Outstanding amount     $ 8,114,000     $ 8,114,000        
Outstanding amount     4,600,000     4,600,000        
Lines of credit [1]     12,714,000     12,714,000 $ 0      
United States [Member] | Letters of Credit [Member] | ABL Credit Agreement [Member]                    
Line Of Credit Facility [Line Items]                    
Line of credit, aggregate limit     1,000,000     1,000,000        
China [Member] | Bank Of China [Member] | Credit Agreement [Member]                    
Line Of Credit Facility [Line Items]                    
Letters of credit, outstanding amount     $ 0     $ 0        
China [Member] | Supplier Finance Arrangement [Member] | Agricultural Bank of China [Member]                    
Line Of Credit Facility [Line Items]                    
Applicable interest rate at end of period     2.72%     2.72%       2.72%
Outstanding amount     $ 2,800,000     $ 2,800,000 $ 0     ¥ 20,000,000
China [Member] | Minimum [Member] | Supplier Finance Arrangement [Member] | Agricultural Bank of China [Member]                    
Line Of Credit Facility [Line Items]                    
Expiration date           Apr. 02, 2026        
China [Member] | Maximum [Member] | Supplier Finance Arrangement [Member] | Agricultural Bank of China [Member]                    
Line Of Credit Facility [Line Items]                    
Expiration date           Apr. 23, 2026        
China [Member] | Letters of Credit [Member] | Bank Of China [Member] | Credit Agreement [Member]                    
Line Of Credit Facility [Line Items]                    
Expiration date         Jul. 31, 2025          
Revolving Credit Facility [Member] | United States [Member]                    
Line Of Credit Facility [Line Items]                    
Applicable interest rate at end of period     5.78%     5.78% 6.81%     5.78%
Line of credit facility, available borrowing     $ 21,400,000     $ 21,400,000        
Letters of credit, outstanding amount     925,000     925,000 $ 535,000      
Interest paid during the year           258,000 11,000 $ 8,000    
Revolving Credit Facility [Member] | United States [Member] | ABL Credit Agreement [Member]                    
Line Of Credit Facility [Line Items]                    
Maximum borrowing capacity     30,000,000     30,000,000        
Maximum borrowing capacity, increased upon mutual agreement     10,000,000     10,000,000        
Maximum amount of letters of credit     $ 2,000,000     $ 2,000,000        
Line of credit facility, accounts receivable, borrowing base percentage     85.00%     85.00%       85.00%
Line of credit facility, borrowing base percentage of eligible inventory value     65.00%     65.00%       65.00%
Line of credit facility, borrowing base percentage of net-orderly-liquidation value of eligible inventory value     85.00%     85.00%       85.00%
Line of credit facility, borrowing base percentage of eligible in-transit inventory value     65.00%     65.00%       65.00%
Line of credit facility, borrowing base percentage of net-orderly-liquidation value of eligible in-transit inventory value     85.00%     85.00%       85.00%
Line of credit facility, borrowing base eligible in-transit inventory value     $ 4,000,000     $ 4,000,000        
Line of credit facility, borrowing base percentage of eligible raw material inventory value     65.00%     65.00%       65.00%
Line of credit facility, borrowing base percentage of net-orderly-liquidation value of eligible raw material inventory value     85.00%     85.00%       85.00%
Line of credit stated amount to determine borrowing base     $ 20,000,000     $ 20,000,000        
Line of credit facility, equal to eligible accounts receivable, borrowing base percent     200.00%     200.00%       200.00%
Line of credit facility, commitment fee percentage           37.50%        
Debt instrument, interest rate terms           The ABL Facility permits both base rate borrowings and borrowings that bear interest at annual rate equal to daily simple SOFR (the secured overnight financing rate administered by the Federal Reserve Bank of New York (or its successor)), in each case, plus an Applicable Margin equal to: (i) 75 basis points for base rate borrowings and 175 basis points for SOFR-based borrowings (if the average monthly excess availability under the ABL Facility is greater than 66 2/3%), (ii) 100 basis points for base rate borrowings and 200 basis points for SOFR-based borrowings (if the average monthly excess availability under the ABL Facility is less than or equal to 66 2/3% and greater than 33 1/3%), or (iii) 125 basis points for base rate borrowings and 225 basis points for SOFR-based borrowings (if the average monthly excess availability under the ABL Facility is less than or equal to 33 1/3%), as applicable, with a fee on unutilized commitments at an annual rate of 37.5 basis points (if usage is equal to or greater than 50% of the maximum credit available under the ABL Facility) or 50 basis points (if usage is less than 50% of the maximum credit available under the ABL Facility).        
Threshold amount to determine excess borrowing availability     $ 30,000,000     $ 30,000,000        
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     1.1       1.1
Revolving Credit Facility [Member] | United States [Member] | Third Amendment [Member]                    
Line Of Credit Facility [Line Items]                    
Expiration date           Jun. 12, 2028        
Line of credit, extended maturity period           3 years        
Revolving Credit Facility [Member] | United States [Member] | Secured Overnight Financing Rate (SOFR) [Member] | ABL Credit Agreement [Member] | Greater than 66 2/3%                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on interest rate           175.00%        
Revolving Credit Facility [Member] | United States [Member] | Secured Overnight Financing Rate (SOFR) [Member] | ABL Credit Agreement [Member] | Less than or equal to 66 2/3% and greater than 33 1/3%                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on interest rate           200.00%        
Revolving Credit Facility [Member] | United States [Member] | Secured Overnight Financing Rate (SOFR) [Member] | ABL Credit Agreement [Member] | Less than or equal to 33 1/3%                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on interest rate           225.00%        
Revolving Credit Facility [Member] | United States [Member] | Base Rate [Member] | ABL Credit Agreement [Member] | Greater than 66 2/3%                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on interest rate           75.00%        
Revolving Credit Facility [Member] | United States [Member] | Base Rate [Member] | ABL Credit Agreement [Member] | Less than or equal to 66 2/3% and greater than 33 1/3%                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on interest rate           100.00%        
Revolving Credit Facility [Member] | United States [Member] | Base Rate [Member] | ABL Credit Agreement [Member] | Less than or equal to 33 1/3%                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on interest rate           125.00%        
Revolving Credit Facility [Member] | United States [Member] | Minimum [Member] | ABL Credit Agreement [Member]                    
Line Of Credit Facility [Line Items]                    
Line of credit facility, excess borrowing ability     $ 6,000,000     $ 6,000,000        
Line of credit facility, covenant, excess borrowing availability     4,500,000     4,500,000        
Revolving Credit Facility [Member] | United States [Member] | Maximum [Member] | ABL Credit Agreement [Member]                    
Line Of Credit Facility [Line Items]                    
Line of credit facility, excess borrowing ability     6,000,000     6,000,000        
Line of credit facility, minimum excess borrowing ability compliance period     4,500,000     $ 4,500,000        
Revolving Credit Facility [Member] | United States [Member] | Maximum [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] | United States [Member] | Letters of Credit [Member]                    
Line Of Credit Facility [Line Items]                    
Remaining letters of credit     $ 75,000     $ 75,000        
Revolving Credit Facility [Member] | China [Member]                    
Line Of Credit Facility [Line Items]                    
Applicable interest rate at end of period     2.60%     2.60%       2.60%
Revolving Credit Facility [Member] | China [Member] | Agricultural Bank of China [Member]                    
Line Of Credit Facility [Line Items]                    
Lines of credit     $ 3,988,000     $ 3,988,000 0      
Revolving credit agreements [Member] | China [Member]                    
Line Of Credit Facility [Line Items]                    
Maximum borrowing capacity     4,000,000 ¥ 29,000,000   4,000,000        
Outstanding amount     $ 4,000,000     $ 4,000,000        
Revolving credit agreements [Member] | China [Member] | Bank Of China [Member]                    
Line Of Credit Facility [Line Items]                    
Interest rate description           Interest charged under this agreement is based on the Loan Prime Rate ("LPR") in China minus 50 basis points (applicable interest rate of 2.60% as of April 27, 2025).        
Revolving credit agreements [Member] | China [Member] | Bank Of China [Member] | Credit Agreement [Member]                    
Line Of Credit Facility [Line Items]                    
Applicable interest rate at end of period     2.60%     2.60%       2.60%
Interest rate description     Interest is charged under the Agreement based on the LPR in China minus 50 basis points at the time of borrowing which represents 2.60% as of April 27, 2025. As of April 27, 2025, the outstanding balance under the working capital loan was approximately $1.4 million USD and there were no outstanding letters of credit under the Agreement              
Revolving credit agreements [Member] | China [Member] | Base Rate [Member]                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on interest rate       50.00%            
Revolving credit agreements [Member] | China [Member] | Base Rate [Member] | Bank Of China [Member] | Credit Agreement [Member]                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on interest rate         50.00%          
Working Capital Loan [Member] | China [Member] | Bank Of China [Member]                    
Line Of Credit Facility [Line Items]                    
Lines of credit     $ 1,375,000     $ 1,375,000 $ 0      
Working Capital Loan [Member] | China [Member] | Bank Of China [Member] | Credit Agreement [Member]                    
Line Of Credit Facility [Line Items]                    
Maximum borrowing capacity     1,400,000   ¥ 10,000,000 1,400,000        
Expiration date Nov. 06, 2025                  
Lines of credit     1,400,000     $ 1,400,000        
Working Capital Loan [Member] | China [Member] | Agricultural Bank of China [Member]                    
Line Of Credit Facility [Line Items]                    
Interest rate description           Interest charged under these agreements is based on the LPR in China at the time of borrowing minus 50 basis points (2.60% as of borrowing dates ranging from May 12, 2025 through May 28, 2025).        
Working Capital Loan [Member] | China [Member] | Agricultural Bank of China [Member] | Forecast [Member]                    
Line Of Credit Facility [Line Items]                    
Maximum borrowing capacity   $ 2,900,000             ¥ 21,000,000  
Applicable interest rate at end of period   2.60%             2.60%  
Working Capital Loan [Member] | China [Member] | Base Rate [Member] | Agricultural Bank of China [Member] | Forecast [Member]                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on interest rate   50.00%                
Working Capital Loan [Member] | China [Member] | Minimum [Member] | Agricultural Bank of China [Member] | Forecast [Member]                    
Line Of Credit Facility [Line Items]                    
Expiration date   May 12, 2025                
Working Capital Loan [Member] | China [Member] | Maximum [Member] | Agricultural Bank of China [Member] | Forecast [Member]                    
Line Of Credit Facility [Line Items]                    
Expiration date   May 28, 2025                
Secured Line Of Credit By Trade Receivable [Member] | China [Member] | Bank Of China [Member] | Credit Agreement [Member]                    
Line Of Credit Facility [Line Items]                    
Maximum borrowing capacity     $ 3,400,000   ¥ 25,000,000 $ 3,400,000        
[1] Of the total $12.7 million, $8.1 million and $4.6 million were recorded within lines of credit - current and lines of credit - long-term, respectively, within the Consolidated Balance Sheet as of April 27, 2025.