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Stock-Based Awards (Tables)
3 Months Ended
Mar. 31, 2013
Stock-Based Awards [Abstract]  
Summary of options and restricted stock activity
                         
    Options    

Weighted

Average

Exercise Price

of Options

   

Restricted

Stock

Awards

 

Balance at January 1, 2013

    12,760,191     $ 0.95       1,281,144  

Granted

    —       $ —         826,849  

Exercised/vested

    (315,000   $ 2.37       (69,080

Forfeitures

    (37,500   $ 4.23       —    
   

 

 

   

 

 

   

 

 

 

Balance at March 31, 2013

    12,407,691     $ 0.90       2,038,913  
   

 

 

   

 

 

   

 

 

 
Summary of stock-based compensation expense
                 
    Three Months Ended
March 31,
 
    2013     2012  

Employees and directors

  $ 1,714     $ 1,424  

Non-employees

    —         691  
   

 

 

   

 

 

 

Total

  $ 1,714     $ 2,115