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Earnings/Loss Per Share
 6 Months Ended
Jun. 30, 2013
Earnings/Loss Per Share
Note 8 —Earnings/Loss Per Share
 
The following table is a reconciliation of the weighted average shares used in the computation of loss per share for the periods presented (in thousands, except per share data):
 
   
Three Months Ended June 30,
  
   
2012
    
2013
  
   
Income
    
Weighted
Average
Shares
    
Per-Share
    
Loss
    
Weighted
Average
Shares
    
Per-
Share
  
Earnings (loss) per share – basic
                                    
Net loss available to common
  stockholders
   $ 214       25,765     $ 0.01     $ (46,873 )     21,920     $ (2.14 )
Effect of dilutive securities:
                                                
Convertible senior notes
     —       —               —       —          
Options and warrants
     —       10               —       —          
Unvested restricted stock grants
     —       95               —       —          
Earnings (loss) per share – diluted
                                                
Loss available to common
stockholders plus assumed exercises
and conversion
   $ 214       25,870     $ 0.01     $ (46,873 )     21,920     $ (2.14 )
 
   
Six Months Ended June 30,
  
   
2012
    
2013
  
   
Loss
    
Weighted
Average
Shares
    
Per-Share
    
Loss
    
Weighted
Average
Shares
    
Per-
Share
  
Loss per share – basic
                                    
Net loss available to common
  stockholders
   $ (15,786 )     25,766     $ (0.61 )   $ (74,435 )     21,921     $ (3.40 )
Effect of dilutive securities:
                                                
Convertible senior notes
     —       —               —       —          
Options and warrants
     —       —               —       —          
Unvested restricted stock grants
     —       —               —       —          
Loss per share – diluted
                                                
Income available to common
stockholders plus assumed exercises
and conversion
   $ (15,786 )     25,766     $ (0.61 )   $ (74,435 )     21,921     $ (3.40 )
 
Basic earnings per share is calculated using 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 and common share equivalents outstanding during the period (which consist of warrants, options and convertible debt to the extent they are dilutive). Common share equivalents that could potentially dilute basic earnings per share in the future, which were excluded from the computation of diluted loss per share, totaled approximately 119,644 and 1,914,197 for the three months ended June 30, 2012 and 2013, respectively. Common share equivalents that could potentially dilute basic earnings per share in the future, which were excluded from the computation of diluted loss per share, totaled approximately 130,165 and 1,634,644 for the six months ended June 30, 2012 and 2013, respectively.