Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation Company Information (Details)

v3.20.2
Basis of Presentation Company Information (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 27, 2020
USD ($)
Restaurant
State
Sep. 27, 2020
USD ($)
Restaurant
State
Sep. 29, 2019
USD ($)
Dec. 29, 2019
USD ($)
Dec. 30, 2018
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]          
Number of Open Restaurants | Restaurant 92 92      
Line of Credit Facility Additional Borrowing Capacity $ 25,000 $ 25,000      
Cash and cash equivalents $ 77,775 $ 77,775 $ 10,476 $ 10,074 $ 8,199
Total Number of Restaurants | Restaurant 101 101      
Repayments of Long-term Lines of Credit $ 25,000 $ 25,000 $ 5,000    
Number of States in which Entity Operates | State 19 19      
Closed restaurants 9 9