Quarterly report pursuant to Section 13 or 15(d)

Common Stock (Tables)

v2.4.0.6
Common Stock (Tables)
3 Months Ended
Mar. 31, 2013
Common Stock [Abstract]  
Components of stock-based 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 three months ended March 31, 2013 and 2012, and from the period June 28, 2006 (date of inception) to date.

 

                         
   

For the three months ended

March 31,

   

Period from

June 28, 2006

(date of

inception) to

March 31,

 
($ in thousands)   2013     2012     2013  

Employee awards

  $ 972     $ 313     $ 4,178  

Non-employee awards

    434       445       3,847  

Non-employee warrants

    117       116       1,010  
   

 

 

   

 

 

   

 

 

 

Total stock-based compensation expense

  $ 1,523     $ 874     $ 9,035  
   

 

 

   

 

 

   

 

 

 
Summary of stock option activity

The following table summarizes stock option activity:

 

                                 
    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

    1,771,590       5.66                  

Options exercised

    (193,490     1.37                  

Options cancelled

    —                            
   

 

 

                         

At March 31, 2013

    4,097,170     $ 4.46     $ 21,564       8.97  
   

 

 

                         

Options vested and expected to vest

    4,097,170     $ 4.46     $ 21,564       8.97  

Options vested and exercisable

    857,053     $ 2.75     $ 5,976       8.05