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Revenue recognition - Disaggregation of Revenue by Timing of Revenue (Details) - USD ($)
$ in Thousands
12 Months Ended
May 25, 2025
May 26, 2024
Segment Reporting Information [Line Items]    
Revenues $ 128,867 $ 128,261
Revenues recognized over time    
Segment Reporting Information [Line Items]    
Revenues 23,194 29,361
Revenues recognized at a point in time    
Segment Reporting Information [Line Items]    
Revenues $ 105,673 $ 98,900