Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.20.4
Summary of Significant Accounting Policies (Narrative) (Details)
 12 Months Ended
Dec. 27, 2020
USD ($)
numberOfRestaurant
numberOfClosedRestaurants
segment
Dec. 29, 2019
USD ($)
numberOfRestaurant
Dec. 30, 2018
USD ($)
Summary of Significant Accounting Policies      
Number of Open Restaurants | numberOfRestaurant 92 100  
Number of Restaurants | numberOfRestaurant 101    
Non-Cash Impairment Charge $ 20,850,000 $ 12,692,000 $ 12,336,000
Deferred Compensation Arrangement with Individual, Salary Deferral Allowed, Percent 80.00%    
Deferred Compensation Arrangement with Individual, Bonus Deferral Allowed, Percent 100.00%    
Deferred Compensation Plan Assets $ 800,000 400,000  
Deferred Compensation Liability, Noncurrent 900,000    
Gift Card Breakage 100,000 100,000 200,000
Marketing expense $ 2,732,000 5,555,000 $ 3,929,000
Number of Reportable Segments | segment 1    
Credit facility maximum borrowing capacity $ 25,000,000.0    
Closed Restaurants | numberOfClosedRestaurants 9    
Cash and cash equivalents $ 86,817,000 $ 10,074,000  
Furniture and Fixtures | Minimum      
Summary of Significant Accounting Policies      
Estimated useful life 3 years    
Furniture and Fixtures | Maximum      
Summary of Significant Accounting Policies      
Estimated useful life 15 years    
Leasehold Improvements | Minimum      
Summary of Significant Accounting Policies      
Estimated useful life 5 years    
Leasehold Improvements | Maximum      
Summary of Significant Accounting Policies      
Estimated useful life 20 years