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Summary of Accounting Policies - Additional Information (Details)
$ in Thousands
 3 Months Ended
Aug. 30, 2025
USD ($)
Vote
shares
Aug. 31, 2024
USD ($)
May 31, 2025
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Finished goods $ 88,600   $ 86,400
Raw material 11,800   11,500
Work in progress 4,200   4,900
Inventory valuation reserves $ 7,700   7,600
Weighted average number of years of amortization expense 6 years 7 months 6 days    
Warranty reserves $ 900   $ 800
Limit of cash dividends Class B common stock (percent) 90.00%    
Net sales $ 54,607 $ 53,725  
Revenue recognized upon satisfaction of performace obligations 1,600 900  
Bill-and-Hold Arrangement      
Summary Of Significant Accounting Policies [Line Items]      
Net sales $ 1,100 $ 3,100  
Common Stock      
Summary Of Significant Accounting Policies [Line Items]      
Common stock shares, authorized | shares 17,000,000    
Common Class B      
Summary Of Significant Accounting Policies [Line Items]      
Common stock shares, authorized | shares 3,000,000    
Number of votes per share | Vote 10    
Maximum      
Summary Of Significant Accounting Policies [Line Items]      
Percentage of services revenue 5.00%