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Earnings Per Share: (Tables) | 6 Months Ended
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Jun. 27, 2020
Earnings Per Share: |
Schedule of shares outstanding used in the calculation of basic and diluted earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended | ​
​ |  | June 27, 2020 |  | June 29, 2019 |  | June 27, 2020 |  | June 29, 2019 |
Denominator for basic EPS — weighted average common shares |  | 3,688,248 |  | 3,771,439 |  | 3,699,923 |  | 3,839,563 |
Dilutive shares associated with option plans |  | 115,559 |  | 300,969 |  | 157,856 |  | 296,264 |
Denominator for diluted EPS — weighted average common shares and dilutive potential common shares |  | 3,803,807 |  | 4,072,408 |  | 3,857,779 |  | 4,135,827 |
Options excluded from EPS calculation — anti-dilutive |  | 27,250 |  | 3,689 |  | 10,269 |  | 6,710 |

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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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