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Note 3 - Earnings Per Share | 6 Months Ended
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Jun. 30, 2017
Notes to Financial Statements |
Earnings Per Share [Text Block] | NOTE 3 - EARNINGS PER SHARE The Company provides dual presentation of basic and diluted earnings per share. Basic earnings per share is calculated by dividing net income by the average shares outstanding. Diluted earnings per share adds the dilutive effects of stock options to average shares outstanding. The following table sets forth the composition of the weighted-average common shares (denominator) used in the basic and diluted earnings per share computation.
|  | For the Three |  |  | For the Six |
|  | Months Ended |  |  | Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Weighted-average common shares outstanding |  |  | 3,386,616 |  |  |  | 2,437,302 |  |  |  | 3,227,184 |  |  |  | 2,350,822 |
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 |  |  | 3,000,451 |  |  |  | 2,051,137 |  |  |  | 2,841,019 |  |  |  | 1,964,657 |
Additional common stock equivalents (stock options) used to calculate diluted earnings per share |  |  | 13,689 |  |  |  | 8,274 |  |  |  | 13,139 |  |  |  | 8,522 |
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share |  |  | 3,014,140 |  |  |  | 2,059,411 |  |  |  | 2,854,158 |  |  |  | 1,973,179 |
Options to purchase 21,375 shares of common stock, at prices ranging from $ 17.55 to $ 37.48 , were outstanding during the three and six months ended June 30, 2017. Of those options, 21,375 were considered dilutive for the three and six month periods based on the market price exceeding the strike price and no options were anti-dilutive. Options to purchase 31,949 shares of common stock, at prices ranging from $ 17.55 to $ 40.24 , were outstanding during the three and six months ended June 30, 2016. Of those options, 24,700 were considered dilutive and 7,249 were considered anti-dilutive for the three and six month periods based on the market price exceeding the strike price.

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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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