Significant Accounting Policies: (Tables)

12 Months Ended

Dec. 31, 2016

Significant Accounting Policies:

Schedule of shares outstanding used in the calculation of basic and diluted earnings per share

	Year Ended
	December 31, 2016	December 26, 2015	December 27, 2014
Denominator for basic EPS — weighted average common shares	4,122,854	4,458,927	5,069,391
Dilutive shares associated with option plans	207,636	192,600	147,523
Denominator for diluted EPS — weighted average common shares and dilutive potential common shares	4,330,490	4,651,527	5,216,914
Options excluded from EPS calculation — anti-dilutive	31,590	22,459	39,240