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Property and Equipment, Net (Schedule Of Property And equipment) (Details) - USD ($)
$ in Thousands
Dec. 30, 2016
Jan. 01, 2016
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 34,429 $ 31,434
Less accumulated depreciation (19,655) (17,332)
Property, Plant and Equipment, Net, Total 14,774 14,102
Equipment [Member]    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 6,580 6,460
Software [Member]    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 26,983 24,049
Leasehold Improvements [Member]    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 373 431
Furniture And Fixtures [Member]    
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 493 $ 494