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Note 4 - Basic and Diluted Loss Per Common Share | 6 Months Ended
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Jun. 30, 2015
Notes to Financial Statements |
Earnings Per Share [Text Block] | 4. Basic and Diluted Loss Per Common Share Basic net loss per share is computed using the weighted-average number of common shares outstanding during the period. Diluted net loss per share is computed using the weighted-average number of common shares and potentially dilutive common share equivalents outstanding during the period. Potentially dilutive common share equivalents consist of convertible preferred stock, stock options and stock purchase warrants. Common share equivalents which potentially could dilute basic earnings per share in the future, and which were excluded from the computation of diluted loss per share, as the effect would be anti-dilutive, totaled approximately 79.0 million and 12.8 million shares at June 30, 2015 and 2014, respectively.

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