v3.25.2
Significant Accounting Policies and Disclosures - Additional Information (Details)
 3 Months Ended 12 Months Ended
May 31, 2025
USD ($)
shares
Mar. 01, 2025
USD ($)
Nov. 30, 2024
USD ($)
Aug. 31, 2024
USD ($)
Jun. 01, 2024
USD ($)
Mar. 02, 2024
USD ($)
Dec. 02, 2023
USD ($)
Sep. 02, 2023
USD ($)
May 31, 2025
USD ($)
Vote
Segment
shares
Jun. 01, 2024
USD ($)
May 27, 2023
USD ($)
Significant Accounting Policies and Disclosures [Line Items]                      
Accounts receivable, net $ 24,117,000       $ 24,845,000       $ 24,117,000 $ 24,845,000 $ 30,100,000
Allowance for credit losses 250,000       323,000       250,000 323,000  
Foreign exchange (gain) loss                 (496,000) 436,000 278,000
Finished goods 86,400,000       93,900,000       86,400,000 93,900,000  
Raw material 11,500,000       12,200,000       11,500,000 12,200,000  
Work in progress 4,900,000       4,000,000       4,900,000 4,000,000  
Inventory valuation reserves 7,600,000       6,000,000       7,600,000 6,000,000  
Write-down of healthcare related inventory not disposed of                 1,400,000    
Inventory provisions                 550,000 606,000 466,000
Construction in progress 2,799,000       2,216,000       2,799,000 2,216,000  
Current contract liability 4,500,000               4,500,000    
Deferred revenue $ 800,000               $ 800,000    
Lease initial term 12 months               12 months    
Depreciation                 $ 3,800,000 4,000,000 3,400,000
Impairment long-lived asset                 0 0 0
Decrease of intangible assets written off due to asset sale                 1,100,000    
Other non-current liabilities $ 1,204,000       781,000       1,204,000 781,000  
Net sales 51,889,000 $ 53,804,000 $ 49,491,000 $ 53,725,000 47,374,000 $ 52,375,000 $ 44,130,000 $ 52,581,000 208,909,000 196,460,000 262,658,000
Accounts payable $ 21,339,000       15,458,000       21,339,000 15,458,000  
Share-based compensation expense                 1,545,000 1,326,000 936,000
Tax benefit for share-based compensation expense                 $ 400,000 300,000 200,000
Limit of cash dividends Class B common stock (percent)                 90.00%    
Number of reportable segments | Segment                 4    
Percentage tax benefit measured based on largest benefit                 50.00%    
Bill-and-Hold Arrangement                      
Significant Accounting Policies and Disclosures [Line Items]                      
Net sales                 $ 4,000,000 2,100,000 3,100,000
ASU 2023-07                      
Significant Accounting Policies and Disclosures [Line Items]                      
Change in Accounting Principle, Accounting Standards Update, Adoption Date May 31, 2025               May 31, 2025    
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true               true    
Manufacturing Facilities                      
Significant Accounting Policies and Disclosures [Line Items]                      
Construction in progress $ 800,000               $ 800,000    
Other Facilities                      
Significant Accounting Policies and Disclosures [Line Items]                      
Construction in progress 400,000               400,000    
IT systems                      
Significant Accounting Policies and Disclosures [Line Items]                      
Construction in progress 1,600,000               1,600,000    
Customer | PMT                      
Significant Accounting Policies and Disclosures [Line Items]                      
Net sales                     $ 31,200,000
Customer Concentration | Sales | Customer                      
Significant Accounting Policies and Disclosures [Line Items]                      
Percentage of products manufactured                     12.00%
Supplier Concentration                      
Significant Accounting Policies and Disclosures [Line Items]                      
Accounts payable $ 3,700,000       $ 3,800,000       $ 3,700,000 $ 3,800,000  
Supplier Concentration | Cost of Sales | Customer                      
Significant Accounting Policies and Disclosures [Line Items]                      
Percentage of products manufactured                 10.00% 11.00%  
Selling, General and Administrative Expense                      
Significant Accounting Policies and Disclosures [Line Items]                      
Amortization expense                 $ 200,000 $ 300,000 $ 300,000
Common Stock                      
Significant Accounting Policies and Disclosures [Line Items]                      
Common stock shares, authorized | shares 17,000,000               17,000,000    
Common Class B                      
Significant Accounting Policies and Disclosures [Line Items]                      
Common stock shares, authorized | shares 3,000,000               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%