Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Employee Compensation (Tables)

v2.4.0.8
Stock-Based Employee Compensation (Tables)
9 Months Ended
Sep. 30, 2013
Stock-Based Employee Compensation [Abstract]  
Stock-based compensation expense
The following table sets forth the stock-based compensation expense that we recognized for the periods indicated (in thousands):
 
 
 
Three Months Ended
September 30,
   
Nine Months Ended
September 30,
 
 
 
2013
   
2012
   
2013
   
2012
 
Stock-based compensation expense relating to:
               
Employee and director stock options
 
$
904
   
$
798
   
$
2,828
   
$
2,622
 
Employee stock purchases
   
441
     
86
     
740
     
553
 
Total stock-based compensation expense
 
$
1,345
   
$
884
   
$
3,568
   
$
3,175
 
 
                               
 
                               
Stock-based compensation expense relating to:
                               
Cost of revenues
 
$
130
   
$
69
   
$
317
   
$
265
 
Sales and marketing
   
260
     
197
     
678
     
692
 
Research and development
   
353
     
204
     
812
     
726
 
General and administrative
   
602
     
414
     
1,761
     
1,492
 
Total stock-based compensation expense
 
$
1,345
   
$
884
   
$
3,568
   
$
3,175
 
 
                               
Weighted average assumptions used in Black-Scholes valuation model
The following are the weighted average assumptions used in the Black-Scholes valuation model for the periods indicated:
 
 
 
Three Months Ended
September 30,
   
Nine Months Ended
September 30,
 
 
 
2013
   
2012
   
2013
   
2012
 
Expected dividend yield
   
     
     
     
 
Risk-free interest rate
   
0.7
%
   
0.4
%
   
0.5
%
   
0.4
%
Expected volatility
   
49
%
   
49
%
   
48
%
   
51
%
Expected life (in years)
   
3.5
     
3.7
     
3.6
     
3.7
 
Expected forfeiture rate
   
7
%
   
6
%
   
6
%
   
7
%