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Net Loss Per Common Share
6 Months Ended
Jun. 30, 2011
Net Loss Per Common Share
3.
Net Loss Per Common Share

Basic net loss per common share is computed by dividing net loss by the weighted average number of common shares outstanding during the period. Unvested restricted shares, although legally issued and outstanding, are not considered outstanding for purposes of calculating basic net income per share. Diluted net loss per common share is computed by dividing net loss by the weighted average number of common shares outstanding during the period plus the dilutive effect of outstanding instruments such as options, warrants, and restricted stock. Because the Company has reported a net loss for all periods presented, diluted loss per common share is the same as basic loss per common share, as the effect of utilizing the fully diluted share count would have reduced the net loss per common share. Therefore, in calculating net loss per share amounts, shares underlying the following potentially dilutive common stock equivalents were excluded from the calculation of diluted net income per common share because their effect was anti-dilutive for each of the periods presented:

   
Quarters Ended June 30,
   
Six Months Ended June 30,
 
   
2011
   
2010
   
2011
   
2010
 
Options
    3,377,794       3,538,877       3,428,973       3,407,177  
Warrants
    8,582,882       8,582,882       8,582,882       8,582,882  
Unvested restricted stock
    188,192       59,563       170,451       29,946  
Total
    12,148,868       12,181,322       12,182,306       12,020,005