Stock incentive plans (Details 2) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2015 |
Jun. 30, 2014 |
|
| Recognized stock-based compensation expense | ||||
| Total stock-based compensation | $ 2,099 | $ 1,851 | $ 3,934 | $ 3,368 |
| Stock-based compensation expense capitalized | 209 | 126 | 425 | 161 |
| Network operations | ||||
| Recognized stock-based compensation expense | ||||
| Total stock-based compensation | 412 | 351 | 759 | 639 |
| Development and Technology | ||||
| Recognized stock-based compensation expense | ||||
| Total stock-based compensation | 129 | 119 | 227 | 260 |
| Selling and marketing | ||||
| Recognized stock-based compensation expense | ||||
| Total stock-based compensation | 642 | 402 | 1,169 | 736 |
| General and administrative | ||||
| Recognized stock-based compensation expense | ||||
| Total stock-based compensation | $ 916 | $ 979 | $ 1,779 | $ 1,733 |