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Earnings Per Share: (Tables) | 9 Months Ended
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Sep. 26, 2020
Earnings Per Share: |
Schedule of shares outstanding used in the calculation of basic and diluted earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended | ​
​ |  | September 26, 2020 |  | September 28, 2019 |  | September 26, 2020 |  | September 28, 2019 |
Denominator for basic EPS — weighted average common shares |  | 3,730,490 |  | 3,808,863 |  | 3,710,112 |  | 3,829,329 |
Dilutive shares associated with option plans |  | 127,212 |  | 256,438 |  | 147,642 |  | 282,989 |
Denominator for diluted EPS — weighted average common shares and dilutive potential common shares |  | 3,857,702 |  | 4,065,301 |  | 3,857,754 |  | 4,112,318 |
Options excluded from EPS calculation — anti-dilutive |  | 11,979 |  | 7,146 |  | 11,057 |  | 6,782 |

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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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