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Basis of Presentation and Significant Accounting Policies - Revenue Recognition (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 03, 2018
USD ($)
Jul. 03, 2018
USD ($)
Revenue Recognition    
Gift card breakage period   3 years
New site agreements    
Revenue Recognition    
Deferred revenue $ 0.2 $ 0.2
Development and site fee    
Revenue Recognition    
Revenue recognized 0.1 0.2
Promotional programs    
Revenue Recognition    
Deferred revenue recognized $ 5.9 $ 5.9
Minimum    
Revenue Recognition    
Revenue recognition for development and site fees over the life of the applicable licensee agreements (in years)   8 years
Maximum    
Revenue Recognition    
Revenue recognition for development and site fees over the life of the applicable licensee agreements (in years)   30 years