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Note 4 - Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2018
Notes Tables |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | For the Three |  |  | For the Six |
|  | Months Ended |  |  | Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Weighted-average common shares outstanding |  |  | 3,611,891 |  |  |  | 3,386,616 |  |  |  | 3,609,174 |  |  |  | 3,227,184 |
Average treasury stock shares |  |  | (386,165 | ) |  |  | (386,165 | ) |  |  | (386,165 | ) |  |  | (386,165 | )
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share |  |  | 3,225,726 |  |  |  | 3,000,451 |  |  |  | 3,223,009 |  |  |  | 2,841,019 |
Additional common stock equivalents (stock options and restricted stock) used to calculate diluted earnings per share |  |  | 14,603 |  |  |  | 13,689 |  |  |  | 15,227 |  |  |  | 13,139 |
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share |  |  | 3,240,329 |  |  |  | 3,014,140 |  |  |  | 3,238,236 |  |  |  | 2,854,158 |

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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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