Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation Plans and Awards (Tables)

v2.4.0.8
Stock-based Compensation Plans and Awards (Tables)
9 Months Ended
Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of assumptions used for determining the per-share fair value of shares granted under the ESPP
The per-share fair value of shares to be granted under the ESPP is determined on the first day of the offering period using the Black-Scholes option pricing model using the following assumptions:
 

Three months ended September 30,

Nine months ended September 30,
 
2013

2014

2013

2014
Expected life (in years)
N/A
 
0.5

 
N/A
 
0.5

Risk-free interest rate
N/A
 
0.05 - 0.08%

 
N/A
 
0.05 - 0.08%

Expected volatility
N/A
 
42
%
 
N/A
 
42
%
Expected dividend yield
N/A
 
0
%
 
N/A
 
0
%
Schedule of assumptions used for estimating the per-share fair value of stock options
The per-share fair value of each stock option was determined on the grant date using the Black-Scholes option pricing model using the following assumptions.
 
 
Three months ended September 30,
 
Nine months ended September 30,
 
2013
 
2014
 
2013
 
2014
Expected life (in years)
6.32

 
6.08

 
5.99 - 6.32

 
6.08

Risk-free interest rate
2.04
%
 
1.93
%
 
0.99 - 2.04%

 
1.71 - 1.93%

Expected volatility
58
%
 
58
%
 
57 - 59%

 
 58 - 59%

Expected dividend yield
0
%
 
0
%
 
0
%
 
0
%
Schedule of stock-based compensation expenses related to all employee and non-employee stock-based awards
Stock-based compensation expense related to all employee and non-employee stock-based awards was as follows:
 
 
Three months ended 
 September 30,
 
Nine months ended 
 September 30,
 
2013
 
2014
 
2013
 
2014
 
(in thousands)
(unaudited)
 
(in thousands)
(unaudited)
Stock-based compensation expense:
 

 
 

 
 

 
 

Cost of revenue - Other
$
540

 
$
1,063

 
$
1,435

 
$
2,976

Product development
2,610

 
4,402

 
6,449

 
12,289

Sales and marketing
5,754

 
10,442

 
15,202

 
28,675

General and administrative
3,260

 
6,204

 
5,740

 
16,176

Total stock-based compensation expense
$
12,164

 
$
22,111

 
$
28,826

 
$
60,116