Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation Plans and Awards (Tables)

v3.3.0.814
Stock-based Compensation Plans and Awards (Tables)
 9 Months Ended
Sep. 30, 2015
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,
 
2014

2015
 
2014
 
2015
Expected life (in years)
0.5

 
0.5

 
0.5

 
0.5

Risk-free interest rate
0.05 - 0.08%

 
0.07 - 0.24%

 
0.05 - 0.08%

 
0.05 - 0.24%

Expected volatility
42
%
 
29 - 42%

 
42
%
 
29 - 42%

Expected dividend yield
0
%
 
0
%
 
0
%
 
0
%
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,
 
2014
 
2015
 
2014
 
2015
Expected life (in years)
6.08

 
6.08

 
6.08

 
6.08

Risk-free interest rate
1.93
%
 
1.92
%
 
1.71 - 1.93%

 
1.92
%
Expected volatility
58
%
 
49
%
 
58 - 59%

 
49
%
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,
 
2014
 
2015
 
2014
 
2015
 
(in thousands)
 
(in thousands)
Stock-based compensation expense
 

 
 

 
 
 
 
Cost of revenue - Other
$
1,063

 
$
1,427

 
$
2,976

 
$
4,040

Product development
4,402

 
6,189

 
12,289

 
16,148

Sales and marketing
10,442

 
13,732

 
28,675

 
38,403

General and administrative
6,204

 
7,446

 
16,176

 
20,882

Total stock-based compensation expense
$
22,111

 
$
28,794

 
$
60,116

 
$
79,473