Earnings Per Share (Details) - shares	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Basic [Abstract]
Weighted average shares outstanding (in shares)	6,265,315	6,258,467	6,264,435	6,257,482
Diluted [Abstract]
Weighted average shares outstanding (in shares)	6,265,315	6,258,467	6,264,435	6,257,482
Dilutive stock options (in shares)	27,002	26,872	27,002	13,436
Denominator for diluted earnings per share (in shares)	6,292,317	6,285,339	6,291,437	6,270,918

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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
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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.

+ References

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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.

+ References

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