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Computation of Basic and Diluted Net Income Per Common Share (Details Textual) (Stock option)	3 Months Ended
	Apr. 04, 2015	Mar. 29, 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	191,221	48,253

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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