Earnings Per Share (Details) - shares	3 Months Ended	9 Months Ended
Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Basic [Abstract]
Weighted average shares outstanding (in shares)	6,262,332	6,259,872	6,263,733	6,258,278
Diluted [Abstract]
Weighted average shares outstanding (in shares)	6,262,332	6,259,872	6,263,733	6,258,278
Dilutive stock options (in shares)	27,916	36,679	27,916	36,679
Denominator for diluted earnings per share (in shares)	6,290,248	6,296,551	6,291,649	6,294,957

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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-Topic 260
-SubTopic 10
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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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