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Stock-Based Awards (Tables)
9 Months Ended
Sep. 30, 2012
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, 2012

    20,852,614     $ 0.79       1,311,371  

Granted

    —       $ 0.00       1,009,114  

Exercised/vested

    (6,565,043   $ 0.60       (771,188

Forfeitures

    (20,000   $ 4.53       (23,483
   

 

 

   

 

 

   

 

 

 

Balance at September 30, 2012

    14,267,571     $ 0.90       1,525,814  
   

 

 

   

 

 

   

 

 

 
Summary of stock-based compensation expense
                                 
    Three Months Ended
September 30,
    Nine Months Ended
September 30,
 
    2012     2011     2012     2011  

Employees and directors

  $ 1,256     $ 995     $ 3,917     $ 3,374  

Non-employees

    614       808       1,986       2,053  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total

  $ 1,870     $ 1,803     $ 5,903     $ 5,427