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Computation of Basic and Diluted Net Income Per Common Share (Details Textual) - shares
3 Months Ended 9 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Oct. 03, 2015
Sep. 27, 2014
Stock option        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Shares that were excluded from the computation of diluted weighted average shares outstanding 282,474 106,527 234,958 228,241