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Intangible assets (Schedule of major components) (Details) - USD ($)
$ in Thousands
Dec. 30, 2023
Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]    
Cost $ 27,324 $ 27,324
Accumulated amortization 5,463 3,678
Net book value 21,861 23,646
Brand names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 25,073 25,073
Accumulated amortization 4,517 2,845
Net book value 20,556 22,228
Customer relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 2,251 2,251
Accumulated amortization 946 833
Net book value $ 1,305 $ 1,418