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Common Stock and Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Common Stock and Earnings Per Share [Abstract] |
Shares Used in Computing Basic and Diluted Earnings per Share | The following table summarizes the shares used in computing basic and diluted net income per share:
|  | 2020 |  |  | 2019 |
Weighted average common shares, basic |  |  | 13,033,681 |  |  |  | 12,964,080 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Employee stock-based compensation |  |  | 839 |  |  |  | 2,212 |
Weighted average common shares, diluted |  |  | 13,034,520 |  |  |  | 12,966,292 |

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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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