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Net Loss Per Share
 3 Months Ended
Mar. 31, 2014
Net Loss Per Share [Abstract]  
Net Loss Per Share
4.  Net Loss Per Share

Basic net loss per share amounts have been computed by dividing net loss by the weighted-average number of common shares outstanding during the period. As of March 31, 2013, 27,793 shares of unvested restricted stock with non-forfeitable rights to dividends were outstanding; all such shares were vested at the end of the first quarter of 2014. The allocation of 2013 net losses to these participating securities pursuant to the two-class method is not material to both basic and diluted earnings per share. For each of the periods presented below, we reported net losses and, accordingly, potential dilutive common shares were not included in the computation of diluted net loss per share since it would have been anti-dilutive. The calculations of net loss per share, basic and diluted, are as follows:

 
 
Net Loss
(Numerator)
  
Weighted Average Common Shares
(Denominator)
(in thousands)
  
Per Share
Amount
 
Three months ended March 31, 2014
 
  
  
 
Basic and diluted
 
$
(9,313
)
  
63,958
  
$
(0.15
)
Three months ended March 31, 2013
            
Basic and diluted
 
$
(11,258
)
  
50,116
  
$
(0.22
)


For these periods, anti-dilutive common shares excluded from diluted per share amounts consist of the following:

 
 
Three Months Ended March 31,
 
 
2014
  
2013
 
 
Weighted Average
 Number
(in thousands)
  
Weighted
Average
 Exercise Price
  
Weighted Average
 Number
(in thousands)
  
Weighted
Average
 Exercise Price
Options
  
5,868
  
$
10.74
   
5,728
  
$
12.37
Restricted stock
  
-
       
28
    
Total
  
5,868
       
5,756