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Note 8 - Net Income (Loss) per Share of Common Stock	3 Months Ended
Note 8 - Net Income (Loss) per Share of Common Stock	Mar. 31, 2016
Notes to Financial Statements
Earnings Per Share [Text Block]	Note 8 – 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 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 19,093 and 753,117 for the three months ended March 31, 2016 and March 29, 2015, respectively, were not used to compute diluted net income (loss) per share because the effects would have been anti-dilutive.