Annual report pursuant to Section 13 and 15(d)

Stock Plans and Stock-Based Compensation (Tables)

v2.4.0.6
Stock Plans and Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2012
Stock Plans and Stock-Based Compensation [Abstract]  
Assumptions used to calculate fair value for stock based awards

The following assumptions were used:

 

                 
Stock option plans   2012     2011  

Exercise price

    $4.75–$7.84       $1.37–$6.00  

Expected stock price volatility

    87.3%–114.3%       87.5%–92.8%  

Risk free rate of interest

    0.16%–2.23%       1.17%–2.56%  

Expected life of options

    2 years–10 years       6 years–10 years  
Components of stock-based compensation expense

The following table summarizes the stock-based compensation expense from stock option, employee stock purchase programs and restricted common stock awards and warrants for the years ended December 31, 2012, 2011 and 2010, and from the period June 28, 2006 (Date of Inception) to date:

 

                                 
($ in thousands)   2012     2011     2010     Period from
June 28, 2006
(Date of Inception) to
December 31, 2012
 

Employee awards

  $ 2,408     $ 520     $ 215     $ 3,206  

Non-employee awards

    664       662       2,114       3,413  

Non-employee warrants

    566       287       —         893  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total compensation expense

  $ 3,638     $ 1,469     $ 2,329     $ 7,512  
   

 

 

   

 

 

   

 

 

   

 

 

 
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
   

Outstanding at December 31, 2011

    1,814,070     $ 2.17     $ 7,852                 9.2  

Options granted

    730,000     $ 6.52                  

Options exercised

    —                            

Options forfeited

    —                            

Options cancelled

    25,000     $ 7.84                  
   

 

 

                         

Outstanding at December 31, 2012

    2,519,070     $ 3.37     $ 2,860       8.54  
   

 

 

                         

Options vested and expected to vest

    2,519,070     $ 3.37     $ 2,860       8.54  
   

 

 

                         

Options vested and exercisable

    856,047     $ 1.95     $ 2,193       8.09