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Business Segment Reporting - Sales by Geographic Area (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
May 29, 2022
Feb. 27, 2022
Nov. 28, 2021
Aug. 29, 2021
May 30, 2021
Feb. 28, 2021
Nov. 29, 2020
Aug. 30, 2020
Feb. 27, 2022
May 29, 2022
May 30, 2021
May 31, 2020
Segment Reporting Information [Line Items]                        
Revenues $ 47,628 $ 53,074 $ 43,452 $ 41,632 $ 44,916 $ 44,690 $ 39,945 $ 41,995 $ 138,158 $ 185,786 $ 171,546 $ 160,066
Switzerland                        
Segment Reporting Information [Line Items]                        
Revenues                   16,800 4,700 1,700
Canada                        
Segment Reporting Information [Line Items]                        
Revenues                   12,600 10,700 9,700
Czech Republic                        
Segment Reporting Information [Line Items]                        
Revenues                   3,500 3,500 1,400
United Kingdom                        
Segment Reporting Information [Line Items]                        
Revenues                   2,900 1,900 1,100
Ireland                        
Segment Reporting Information [Line Items]                        
Revenues                   2,200 2,000 4,000
Belgium                        
Segment Reporting Information [Line Items]                        
Revenues                   0 13,700 13,800
All Other Countries                        
Segment Reporting Information [Line Items]                        
Revenues                   $ 2,000 $ 1,900 $ 2,200