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Note 3 - Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2014
Earnings Per Share [Abstract] |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | For the Three |  |  | For the Nine |
|  | Months Ended |  |  | Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Weighted-average common shares issued |  |  | 2,233,654 |  |  |  | 2,212,020 |  |  |  | 2,228,502 |  |  |  | 2,202,747 |
Average treasury stock shares |  |  | (189,530 | ) |  |  | (189,530 | ) |  |  | (189,530 | ) |  |  | (189,530 | )
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share |  |  | 2,044,124 |  |  |  | 2,022,490 |  |  |  | 2,038,972 |  |  |  | 2,013,217 |
Additional common stock equivalents (stock options) used to calculate diluted earnings per share |  |  | 7,888 |  |  |  | 6,930 |  |  |  | 6,688 |  |  |  | 7,981 |
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share |  |  | 2,052,012 |  |  |  | 2,029,420 |  |  |  | 2,045,660 |  |  |  | 2,021,198 |

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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://www.xbrl.org/2003/role/presentationRef -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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