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Note 3 - Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2015
Earnings Per Share [Abstract] |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | For the Three |  |  | For the Six |
|  | Months Ended |  |  | Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Weighted-average common shares outstanding |  |  | 2,248,516 |  |  |  | 2,227,556 |  |  |  | 2,245,868 |  |  |  | 2,225,555 |
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 |  |  | 2,058,986 |  |  |  | 2,038,026 |  |  |  | 2,056,338 |  |  |  | 2,036,025 |
Additional common stock equivalents (stock options) used to calculate diluted earnings per share |  |  | 9,327 |  |  |  | 6,538 |  |  |  | 9,590 |  |  |  | 6,156 |
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share |  |  | 2,068,313 |  |  |  | 2,044,564 |  |  |  | 2,065,928 |  |  |  | 2,042,181 |

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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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