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Stock-Based Awards (Tables)
6 Months Ended
Jun. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of Options and Restricted Stock Activity

A summary of options and restricted stock activity is as follows:

 

     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

     (665,500   $ 1.61         (69,080

Forfeitures

     (37,500   $ 4.23         —    
  

 

 

   

 

 

    

 

 

 

Balance at June 30, 2013

     12,057,191      $ 0.90         2,038,913   
  

 

 

   

 

 

    

 

 

 
Summary of Stock-based Compensation Expense

A summary of stock-based compensation expense is as follows:

 

     Three Months Ended
June 30,
     Six Months Ended
June 30,
 
     2013      2012      2013      2012  

Employees and directors

   $ 1,691       $ 1,237       $ 3,405       $ 2,661   

Non-employees

     —          681         —          1,372   
  

 

 

    

 

 

    

 

 

    

 

 

 

Total

   $ 1,691       $ 1,918       $ 3,405       $ 4,033