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Net Income Per Share (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Net income available to common shareholders
Net income, as reported	$ 4,665	$ 4,886
Less: net income attributable to participating shares	16	29
Net income available to common shareholders	$ 4,649	$ 4,857
Reconciliation of basic to diluted weighted average shares of common stock outstanding
Basic weighted average shares outstanding	8,015,000	8,285,000
Stock options and restricted stock units	331,000	295,000
Diluted weighted average shares outstanding	8,346,000	8,580,000
Calculation of common stock equivalents for purposes of computing diluted weighted average shares outstanding
Anti-dilutive securities excluded from EPS computation (in shares)	20,078	5,689

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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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount of undistributed earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method.

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