v3.26.1
Nature of Business and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ / shares in Units, shares in Thousands
 3 Months Ended 4 Months Ended 12 Months Ended
May 02, 2026
Apr. 26, 2025
May 02, 2026
May 02, 2026
Apr. 26, 2025
Apr. 27, 2024
Variable Interest Entity [Line Items]            
Contract with customer assets $ 66,552,000 $ 41,169,000 $ 66,552,000 $ 66,552,000 $ 41,169,000  
Gross profit       229,006,000 195,487,000 $ 222,443,000
Income (loss) from equity method investments       (2,008,000) (3,053,000) (3,764,000)
Impairment 4,576,000 4,576,000 4,576,000 4,576,000 4,576,000  
Amount invested       5,383,000 4,565,000 5,050,000
Allowance for credit losses on affiliate loan       3,205,000 15,480,000 0
Cash and cash equivalents 131,639,000 127,507,000 131,639,000 131,639,000 127,507,000 $ 81,299,000
Capitalized contract cost, net 704,000 $ 321,000 704,000 704,000 $ 321,000  
Self insured, individual retention $ 250,000   $ 250,000 $ 250,000    
Common stock, par value (in dollar per share) $ 0.00001 $ 0.00001 $ 0.00001 $ 0.00001 $ 0.00001  
Minimum            
Variable Interest Entity [Line Items]            
Product warranty accrual, standard parts warranty coverage term (year)       1 year    
Product warranty accrual, installation warranty coverage term (year)       1 year    
Maximum            
Variable Interest Entity [Line Items]            
Product warranty accrual, standard parts warranty coverage term (year)       5 years    
Product warranty accrual, installation warranty coverage term (year)       10 years    
Stock options            
Variable Interest Entity [Line Items]            
Antidilutive securities excluded from computation of earnings per share, amount (in shares)         49 675
Antidilutive securities excluded from computation of earnings per share, weighted average exercise price (in dollars per share)         $ 10.57 $ 10.29
Geographic Distribution, Foreign            
Variable Interest Entity [Line Items]            
Cash and cash equivalents $ 9,710,000   $ 9,710,000 $ 9,710,000    
United States of America, Dollars            
Variable Interest Entity [Line Items]            
Cash and cash equivalents $ 121,929,000   $ 121,929,000 $ 121,929,000    
Convertible note            
Variable Interest Entity [Line Items]            
Antidilutive securities excluded from computation of earnings per share, amount (in shares)           3,915
Debt instrument, face amount           $ 25,000,000
Miortech            
Variable Interest Entity [Line Items]            
Equity method investment, ownership percentage 55.90%   55.90% 55.90%    
Equity method investments $ 0 $ 0 $ 0 $ 0 $ 0  
Income (loss) from equity method investments       (993,000) (891,000) (1,758,000)
Impairment 0 0 0 0 0 1,392,000
Purchase of convertible notes 5,429,000 3,809,000 5,429,000 5,429,000 3,809,000  
Allowance for credit losses on affiliate loan 3,750,000          
Investment in affiliates loss, amount   0     0  
Convertible note and investment in affiliates, amount       0 3,123,000  
Miortech | Convertible note            
Variable Interest Entity [Line Items]            
Amount invested       1,283,000 1,340,000  
Interest payable 228,000 149,000 228,000 228,000 149,000  
X Display Company Technology Limited            
Variable Interest Entity [Line Items]            
Income (loss) from equity method investments       (1,015,000) (2,162,000) (2,006,000)
Impairment 0 0 0 0 0 4,967,000
Accounts payable 0 75,000 0 0 75,000  
Purchase of convertible notes   16,034,000     16,034,000  
Allowance for credit losses on affiliate loan   15,480,000 1,012,000      
Credit expense forgiven       16,492,000    
X Display Company Technology Limited | Convertible note            
Variable Interest Entity [Line Items]            
Amount invested       4,100,000 3,225,000  
Interest payable 449,000 689,000 449,000 449,000 689,000  
X Display Company Technology Limited | Product Design And Development            
Variable Interest Entity [Line Items]            
Related party transaction, amounts of transaction       325,000 771,000 $ 577,000
Variable Interest Entity, Primary Beneficiary            
Variable Interest Entity [Line Items]            
Contract with customer assets 211,000 0 211,000 211,000 0  
Contract with customer, liability 39,000 $ 41,000 39,000 39,000 41,000  
Gross profit       276,000 $ 89,000  
Subsidiaries | Geographic Distribution, Foreign            
Variable Interest Entity [Line Items]            
Cash and cash equivalents 7,570,000   7,570,000 7,570,000    
Subsidiaries | United States of America, Dollars            
Variable Interest Entity [Line Items]            
Cash and cash equivalents $ 9,830,000   $ 9,830,000 $ 9,830,000