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Impairment and Closure Costs (Details)
3 Months Ended 12 Months Ended
Dec. 28, 2021
USD ($)
Dec. 28, 2021
USD ($)
Dec. 29, 2020
USD ($)
restaurant
Dec. 31, 2019
USD ($)
restaurant
Impairment and Closure Costs        
Impairment and closure, net   $ 734,000 $ 2,263,000 $ (899,000)
Impairment of goodwill $ 0 0 1,076,000 0
Gain related to the leasehold improvements       1,200,000
Operating lease right-of-use assets, total gain (loss)       1,400,000
Costs associated with the relocation of restaurants       $ 600,000
Impairment And Closures, Four Restaurants [Member]        
Impairment and Closure Costs        
Asset Impairment Charges     $ 1,200,000  
Number Of Restaurants Related | restaurant     4  
Impairment And Closures, Two Restaurants [Member]        
Impairment and Closure Costs        
Asset Impairment Charges   $ 700,000    
Impairment of goodwill     $ 1,100,000  
Number Of Restaurants Related   2 2  
Impairment And Closures, One Restaurants [Member]        
Impairment and Closure Costs        
Number Of Restaurants Related | restaurant       1
Gain related to the forced relocation       $ 2,600,000
Impairment And Closures, One Underperforming Restaurants [Member]        
Impairment and Closure Costs        
Operating lease right-of-use assets, total gain (loss)       $ (1,100,000)