Quarterly report pursuant to Section 13 or 15(d)

Common Stock (Tables)

v2.4.0.8
Common Stock (Tables)
6 Months Ended
Jun. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Components of Stock-Based Compensation Expense

Compensation Expense. The following table summarizes the stock-based compensation expense from awards, including stock options and restricted Common Stock awards to employees and non-employees, compensation expense for the ESPP and warrants to non-employees for the six months ended June 30, 2013 and 2012, and from the period June 28, 2006 (date of inception) to date.

 

    

For the six months ended

June 30,

    

Period from

June 28, 2006

(date of

inception) to

June 30,

 
($ in thousands)    2013      2012      2013  

Employee awards

   $ 2,016       $ 812       $ 5,222   

Non-employee awards

     652         242         4,065   

Non-employee warrants

     138         164         1,031   
  

 

 

    

 

 

    

 

 

 

Total stock-based compensation expense

   $ 2,806       $ 1,218       $ 10,318   
  

 

 

    

 

 

    

 

 

 
Summary of Stock Option Activity

The following table summarizes stock option activity since December 31, 2012:

 

     Outstanding Options      Weighted
Average
Remaining
Contractual
Life (in
years)
 
($ in thousands except per share amounts)    Number of
Shares
    Weighted
Average
Exercise
Price
     Total
Weighted
Average
Intrinsic
Value
    

At December 31, 2012

     2,519,070      $ 3.37       $ 2,860         8.5   

Options granted

     2,031,590        6.07         

Options exercised

     (245,157     1.56         

Options cancelled

     (20,000     1.93         
  

 

 

         

At June 30, 2013

     4,285,503      $ 4.77       $ 16,434         8.9   
  

 

 

         

Options vested and expected to vest

     4,285,503      $ 4.77       $ 16,434         8.9   

Options vested and exercisable

     1,047,053      $ 2.84       $ 6,031         7.9