Earnings Per Share: (Details)	3 Months Ended	9 Months Ended
Sep. 29, 2012	Sep. 24, 2011	Sep. 29, 2012	Sep. 24, 2011
Earnings Per Share:
Denominator for basic EPS - weighted average common shares	5,013,822	4,970,046	5,041,023	4,980,160
Dilutive shares associated with option plans	208,897	293,297	216,034	259,264
Denominator for diluted EPS - weighted average common shares and dilutive potential common shares	5,222,719	5,263,343	5,257,057	5,239,424
Options excluded from EPS calculation - anti-dilutive (in shares)	23,270	2,614	18,863	10,640

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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+ Details

- 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+ Details

- 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

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+ Details