Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation Plans and Awards (Tables)

v2.4.1.9
Stock-based Compensation Plans and Awards (Tables)
 3 Months Ended
Mar. 31, 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 March 31,
 
2014

2015
Expected life (in years)
0.5

 
0.5

Risk-free interest rate
0.08
%
 
0.05-0.07%

Expected volatility
42
%
 
42
%
Expected dividend yield
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 
 March 31,
 
2014
 
2015
 
(in thousands)
(unaudited)
Stock-based compensation expense
 

 
 

Cost of revenue - Other
$
881

 
$
1,207

Product development
3,461

 
4,605

Sales and marketing
8,311

 
11,344

General and administrative
4,739

 
6,039

Total stock-based compensation expense
$
17,392

 
$
23,195