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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2014
Equity [Abstract]  
Summarization of Common Stock Shares for Issuance Under Existing Equity Compensation Plans

At December 31, 2014, we had 24,806,565 reserved shares of common stock, all of which are reserved for issuance under our equity compensation plans as summarized in the following table (share number in thousands):

 

Plan Category

    Number of Securities to be
Issued Upon Exercise of
Outstanding Options
(a)		      Weighted-Average
Exercise Price of
Outstanding Options
(b)		      Number of Securities Remaining
Available for Issuance Under
Equity Compensation Plans
(Excluding Securities Reflected
in Column(a))
(c)		  

Equity compensation plans approved by security holders(1)

      18,601       $ 10.68         2,812   

Equity compensation plans not approved by security holders

      3,394       $ 9.52         —    
  

 

 

     

 

 

     

 

 

  

Total

   21,995    $ 10.50      2,812   
  

 

 

        

 

 

  

 

(1) Includes shares of common stock available for future issuance under our ESPP as of December 31, 2014.