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Impairment and Closure Costs (Details)
12 Months Ended
Dec. 27, 2022
USD ($)
restaurant
Dec. 28, 2021
USD ($)
restaurant
Dec. 29, 2020
USD ($)
restaurant
Impairment and Closure Costs      
Impairment and closure, net $ 1,600,000 $ 734,000 $ 2,263,000
Impairment of goodwill 0 0 1,100,000
Ongoing closure costs 600,000    
Gain on sale of land and building $ 700,000    
Impairment And Closures, Four Restaurants [Member]      
Impairment and Closure Costs      
Asset Impairment Charges     $ 1,200,000
Number of Restaurants | restaurant     4
Impairment And Closures, Three Restaurants [Member]      
Impairment and Closure Costs      
Number of Restaurants | restaurant 3    
Impairment And Closures, Two Restaurants [Member]      
Impairment and Closure Costs      
Asset Impairment Charges $ 1,700,000 $ 700,000  
Impairment of goodwill     $ 1,100,000
Number of Restaurants | restaurant   2 2
Number of restaurants relocated | restaurant 2