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Net Loss Per Share
 12 Months Ended
Dec. 31, 2011
Net Loss Per Share [Abstract]  
Net Loss Per Share

13.    Net Loss Per Share

The Company accounts for and discloses net loss per common share in accordance with FASB ASC Topic 260 “ Earnings per Share.” Basic net loss per common share is computed by dividing net loss attributable to common stockholders by the weighted average number of common shares outstanding. Diluted net loss per common share is computed by dividing net loss attributable to common stockholders by the weighted average number of common shares that would have been outstanding during the period assuming the issuance of common shares for all potential dilutive common shares outstanding. Potential common shares consist of shares issuable upon the exercise of stock options and warrants. Because the inclusion of potential common shares would be anti-dilutive for all periods presented, diluted net loss per common share is the same as basic net loss per common share.

The following table sets forth the potential common shares excluded from the calculation of net loss per common share because their inclusion would be anti-dilutive:

 

                 
    December 31,  
    2011     2010  

Options to purchase common stock

     6,163,137       4,333,136  

Warrants to purchase common stock

     14,120,642       2,100,642  
   

 

 

    

 

 

  

Total

     20,283,779       6,433,778