v3.3.1.900

Stock incentive plans (Tables) | 12 Months Ended
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Dec. 31, 2015
Stock incentive plans |
Schedule of stock-based compensation expense |
|  | Years ended December 31, |
|  | 2015 |  | 2014 |  | 2013 |
Network operations |  | $ | 1,504 |  | $ | 1,356 |  | $ | 888 |
Development and technology |  |  | 731 |  |  | 600 |  |  | 380 |
Selling and marketing |  |  | 3,411 |  |  | 2,017 |  |  | 1,045 |
General and administrative |  |  | 3,752 |  |  | 3,191 |  |  | 2,193 |
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Total stock-based compensation expense |  | $ | 9,398 |  | $ | 7,164 |  | $ | 4,506 |
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Summary of stock option activity |
|  | Number of Options (000's) |  | Weighted Average Exercise Price |  | Weighted- Average Remaining Contract Life (years) |  | Aggregate Intrinsic Value |
Outstanding at December 31, 2014 |  |  | 4,341 |  | $ | 6.60 |  |  | 5.8 |  | $ | 11,017 |
Exercised |  |  | (440 | ) | $ | 3.12 |  |  |  |  |  |  |
Canceled/forfeited |  |  | (153 | ) | $ | 9.51 |  |  |  |  |  |  |
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Outstanding at December 31, 2015 |  |  | 3,748 |  | $ | 6.89 |  |  | 5.0 |  | $ | 6,611 |
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Vested, exercisable and expected to vest at December 31, 2015 |  |  | 3,728 |  | $ | 6.89 |  |  | 5.0 |  | $ | 6,605 |
Exercisable at December 31, 2015 |  |  | 3,175 |  | $ | 6.73 |  |  | 4.6 |  | $ | 6,475 |
Summary of nonvested RSU activity under the 2011 Plan |
|  | Number of Shares (000's) |  | Weighted Average Grant Date Fair Value |
Non-vested at December 31, 2014 |  |  | 1,385 |  | $ | 6.09 |
Granted |  |  | 1,472 |  | $ | 7.55 |
Vested |  |  | (949 | ) | $ | 7.69 |
Canceled/forfeited |  |  | (89 | ) | $ | 7.14 |
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Non-vested at December 31, 2015 |  |  | 1,819 |  | $ | 6.39 |
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