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Note 4 - Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2020
Notes Tables |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | For the Three |  |  | For the Nine |
|  | Months Ended |  |  | Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Weighted-average common shares issued |  |  | 7,305,653 |  |  |  | 7,294,014 |  |  |  | 7,301,091 |  |  |  | 7,283,808 |
Average treasury stock shares |  |  | (929,362 | ) |  |  | (835,756 | ) |  |  | (913,510 | ) |  |  | (797,606 | )
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share |  |  | 6,376,291 |  |  |  | 6,458,258 |  |  |  | 6,387,581 |  |  |  | 6,486,202 |
Additional common stock equivalents (stock options and restricted stock) used to calculate diluted earnings per share |  |  | 9,474 |  |  |  | 20,808 |  |  |  | 10,093 |  |  |  | 20,636 |
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share |  |  | 6,385,765 |  |  |  | 6,479,066 |  |  |  | 6,397,674 |  |  |  | 6,506,838 |

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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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