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Business Segment Reporting - Sales by Geographic Area (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Feb. 26, 2023
Feb. 27, 2022
Feb. 26, 2023
Feb. 27, 2022
Segment Reporting Information [Line Items]        
Product sales $ 27,600 $ 37,399 $ 77,748 $ 90,140
Switzerland        
Segment Reporting Information [Line Items]        
Product sales 6,800 8,200 14,800 13,600
Canada        
Segment Reporting Information [Line Items]        
Product sales 700 200 1,900 1,400
Czech Republic        
Segment Reporting Information [Line Items]        
Product sales 700 700 2,400 2,400
Ireland        
Segment Reporting Information [Line Items]        
Product sales 1,100 500 2,900 1,300
Australia        
Segment Reporting Information [Line Items]        
Product sales 1,100 0 1,100 0
United Kingdom        
Segment Reporting Information [Line Items]        
Product sales 600 900 1,400 2,200
All Other Countries        
Segment Reporting Information [Line Items]        
Product sales $ 200 $ 1,600 $ 400 $ 1,900