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Note 4 - Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2019
Notes Tables |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | For the Three |  |  | For the Nine |
|  | Months Ended |  |  | Months Ended |
|  | September 30, 2019 |  |  | September 30, 2019 |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Weighted-average common shares issued |  |  | 3,647,007 |  |  |  | 3,620,558 |  |  |  | 3,641,904 |  |  |  | 3,613,010 |
Average treasury stock shares |  |  | (417,878 | ) |  |  | (386,165 | ) |  |  | (398,803 | ) |  |  | (386,165 | )
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share |  |  | 3,229,129 |  |  |  | 3,234,393 |  |  |  | 3,243,101 |  |  |  | 3,226,845 |
Additional common stock equivalents (stock options and restricted stock) used to calculate diluted earnings per share |  |  | 10,404 |  |  |  | 13,933 |  |  |  | 10,318 |  |  |  | 15,454 |
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share |  |  | 3,239,533 |  |  |  | 3,248,326 |  |  |  | 3,253,419 |  |  |  | 3,242,299 |

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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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