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9. Net Loss per Common Share
9 Months Ended
Sep. 30, 2014
Notes to Financial Statements  
9. Net Loss per Common Share

Basic net loss per common share is calculated by dividing the net loss by the weighted average number of common shares outstanding during the period. Diluted earnings per share is calculated using the weighted average number of common shares outstanding plus dilutive common stock equivalents outstanding during the period. Common stock equivalents are excluded for the three and nine month periods ended September 30, 2014 and 2013, since the effect is anti-dilutive due to the Company’s net losses. Common stock equivalents include stock options and warrants.

 

Basic weighted average common shares outstanding, and the potentially dilutive securities excluded from loss per share computations because they are anti-dilutive, are as follows as of September 30, 2014 and 2013, respectively:

 

    Three Month Period Ended     Nine Month Period Ended  
    September 30,     September 30,  
    2014     2013     2014     2013  
Basic and diluted weighted average common stock shares outstanding     12,042,739       5,009,274       9,987,682       5,002,135  
Potentially dilutive securities excluded from loss per share computations:                                
Common stock options     1,384,341       1,410,240       1,384,341       1,410,240  
Common stock purchase warrants     7,428,141       529,018       7,428,141       529,018