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Note 11 - Net Loss per Share
9 Months Ended
Sep. 30, 2012
Earnings Per Share [Text Block]
Note 11.  Net Loss per Share

Net loss per share has been computed by dividing net loss by the weighted-average number of shares outstanding during the period. Diluted per share amounts reflect potential dilution from the exercise or conversion of securities into common stock. The Company’s capital structure includes common stock options and common stock warrants, all of which have been excluded from net loss per share calculations as they are antidilutive, as follows:

   
Three Months Ended September 30,
   
Nine Months Ended September 30,
 
   
2012
   
2011
   
2012
   
2011
 
Weighted average outstanding options
    3,974,642       3,368,522       3,916,671       3,724,864  
Weighted average outstanding warrants
    2,904,769       1,793,530       2,509,937       2,203,861