v3.26.1
Significant Accounting Policies and Disclosures - Additional Information (Details)
 12 Months Ended
May 30, 2026
USD ($)
Vote
May 31, 2025
USD ($)
Jun. 01, 2024
USD ($)
Oct. 07, 2025
shares
Significant Accounting Policies and Disclosures [Line Items]        
Accounts receivable, net $ 33,162,000 $ 24,117,000 $ 24,800,000  
Allowance for credit losses 350,000 250,000    
Foreign exchange (gain) loss 452,000 (496,000) 436,000  
Finished goods 86,500,000 86,400,000    
Raw material 11,800,000 11,500,000    
Work in progress 4,700,000 4,900,000    
Inventory valuation reserves 6,300,000 7,600,000    
Inventory provisions 499,000 550,000 606,000  
Construction in progress $ 1,958,000 2,799,000    
Lease initial term 12 months      
Depreciation $ 3,700,000 3,800,000 4,000,000  
Impairment long-lived asset 0 0 0  
Impairment associated with the Healthcare disposal   500,000    
Other non-current liabilities 1,168,000 1,204,000    
Net sales 228,564,000 208,909,000 196,460,000  
Accounts payable 19,593,000 21,339,000    
Share-based compensation expense 1,621,000 1,545,000 1,326,000  
Tax benefit for share-based compensation expense $ 400,000 400,000 300,000  
Common stock shares, authorized | shares       25,000,000
Preferred stock authorized | shares       0
Limit of cash dividends Class B common stock (percent) 90.00%      
Percentage tax benefit measured based on largest benefit 50.00%      
Bill-and-Hold Arrangement        
Significant Accounting Policies and Disclosures [Line Items]        
Net sales $ 2,600,000 4,000,000 2,100,000  
ASU 2023-09        
Significant Accounting Policies and Disclosures [Line Items]        
Change in Accounting Principle, Accounting Standards Update, Adoption Date May 30, 2026      
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true      
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] true      
Manufacturing Facilities        
Significant Accounting Policies and Disclosures [Line Items]        
Construction in progress $ 700,000      
Other Facilities        
Significant Accounting Policies and Disclosures [Line Items]        
Construction in progress 900,000      
IT systems        
Significant Accounting Policies and Disclosures [Line Items]        
Construction in progress 400,000      
Customer | PMT        
Significant Accounting Policies and Disclosures [Line Items]        
Net sales $ 31,500,000      
Customer Concentration | Sales | Customer        
Significant Accounting Policies and Disclosures [Line Items]        
Percentage of products manufactured 14.00%      
Supplier Concentration        
Significant Accounting Policies and Disclosures [Line Items]        
Accounts payable $ 1,400,000 $ 3,700,000    
Supplier Concentration | Cost of Sales | Customer        
Significant Accounting Policies and Disclosures [Line Items]        
Percentage of products manufactured 10.00% 10.00%    
Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense        
Significant Accounting Policies and Disclosures [Line Items]        
Amortization expense $ 100,000 $ 200,000 $ 300,000  
Common Stock        
Significant Accounting Policies and Disclosures [Line Items]        
Common stock shares, authorized | shares       22,000,000
Common Class B        
Significant Accounting Policies and Disclosures [Line Items]        
Common stock shares, authorized | shares       3,000,000
Number of votes per share | Vote 10      
Maximum        
Significant Accounting Policies and Disclosures [Line Items]        
Percentage of services revenue 5.00%      
Maximum | Customer Concentration | Sales | Customer        
Significant Accounting Policies and Disclosures [Line Items]        
Concentration risk threshold percentage   10.00% 10.00%  
Maximum | Customer Concentration | Accounts Receivable | Customer        
Significant Accounting Policies and Disclosures [Line Items]        
Concentration risk threshold percentage 10.00% 10.00%