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Stock-Based Awards
6 Months Ended
Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Stock-Based Awards

6. Stock-Based Awards

The Company grants equity awards to employees and directors. Options are issued generally for terms of ten years and vest between two to four years. Options are issued with an exercise price equal to the fair value of the Company on the date of grant. The Company estimated the fair value for options using the Black-Scholes option pricing model. All restricted stock and option awards require future service as a condition of vesting with certain awards subject to acceleration under certain conditions. Awards generally vest over one to four years.

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, 2014

     7,844,691      $ 1.29         1,896,877   

Granted

     —       $ —          585,125   

Exercised/vested

     (803,125   $ 0.14         (701,429

Forfeitures

     —       $ —          (3,662
  

 

 

   

 

 

    

 

 

 

Balance at June 30, 2014

     7,041,566      $ 1.42         1,776,911   
  

 

 

   

 

 

    

 

 

 

 

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

 

Three Months Ended
June 30,
     Six Months Ended
June 30,
 
2014      2013      2014      2013  
$ 2,030       $ 1,691       $ 4,045       $ 3,405