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Note 10 - Per Share Data - Weighted Average Number of Common Shares (Details) - shares	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Basic weighted average shares outstanding (in shares)	12,238,760	11,946,653
Dilutive effect of outstanding restricted stock awards (in shares)	18,747	101,114
Weighted average dilutive shares outstanding (in shares)	12,257,507	12,047,767

X

- Definition

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.

+ References

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-Publisher FASB
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-Topic 260
-SubTopic 10
-Section 45
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X

- Definition

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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- Definition

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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