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Significant Accounting Policies (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Basis of Presentation and Principles of Consolidation        
Length of fiscal year 364 days 371 days 364 days  
Advertising        
Advertising expenses $ 1.8 $ 1.7 $ 2.0  
Buildings        
Property and Equipment        
Useful life       40 years
Leasehold interest in ground leases        
Property and Equipment        
Useful life       86 years
Low end of range        
Basis of Presentation and Principles of Consolidation        
Length of fiscal year 364 days      
Property and Equipment        
Useful life 3 years      
Long-Lived Assets        
Useful live of purchased intangible assets 1 year      
High end of range        
Basis of Presentation and Principles of Consolidation        
Length of fiscal year 371 days      
Property and Equipment        
Useful life 7 years      
Long-Lived Assets        
Useful live of purchased intangible assets 12 years