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Significant Accounting Policies: (Tables) | 12 Months Ended
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Dec. 26, 2020
Significant Accounting Policies: |
Schedule of shares outstanding used in the calculation of basic and diluted earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended |
​ |  | December 26, 2020 |  | December 28, 2019 |  | December 29, 2018 |
Denominator for basic EPS — weighted average common shares |  | 3,719,485 |  | 3,840,638 |  | 3,874,757 | ​
Dilutive shares associated with option plans |  | 143,779 |  | 259,991 |  | 275,022 | ​
Denominator for diluted EPS — weighted average common shares and dilutive potential common shares |  | 3,863,264 |  | 4,100,629 |  | 4,149,779 | ​
Options excluded from EPS calculation — anti-dilutive |  | 14,822 |  | 10,262 |  | 21,933 | ​

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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