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Note 11 - Earnings (Loss) per Share | 9 Months Ended
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Sep. 30, 2015
Notes to Financial Statements |
Earnings Per Share [Text Block] | 11. Net income (Loss) per Share of Common Stock For all periods, basic net income (loss) per share is calculated by dividing net income (loss) by the weighted-average common shares outstanding. Diluted net income per share in profitable periods reflects the effect of all potentially dilutive common shares outstanding and is calculated by dividing net income by the weighted-average of all common and potentially dilutive shares outstanding. Weighted-average shares related to potentially dilutive stock options of 616,968 and 221,667 for the three and nine months ended September 30, 2015, respectively, and 753,771 and 751,046 for the three and nine months ended September 28, 2014, respectively, were not used to compute diluted income (loss) per share because the effects would have been anti-dilutive.

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