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Note 9 - Earnings Per Share | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Earnings Per Share [Text Block] | Note 9 – Earnings per Share The calculation of basic and diluted weighted average common shares outstanding is as follows:
|  | 2017 |  |  | 2016 |
Weighted average common shares outstanding basic earnings per share |  |  | 6,375,848 |  |  |  | 6,285,815 |
Effect of potential common share issuance: |  |  |  |  |  |  |  |
Stock options |  |  | 11,616 |  |  |  | --- |
Weighted average common shares outstanding |  |  |  |  |  |  |  |
Diluted earnings per share |  |  | 6,387,464 |  |  |  | 6,285,815 |
Stock options to purchase 387,930 shares of common stock were outstanding and 207,930 were exercisable at December 31, 2017. At December 31, 2017, options to purchase 22,930 shares were included in the diluted earnings per share calculation because their average market price was higher than the exercise price. Stock options to purchase 284,730 shares of common stock were outstanding and 124,730 were exercisable at December 31, 2016. At December 31, 2016 none of the outstanding options were included in the diluted earnings per share calculation as their effect would have been anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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