v3.19.2

Stock incentive plans (Tables) | 6 Months Ended
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Jun. 30, 2019
Stock incentive plans |
Schedule of stock-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended
​ | ​ | June 30, | ​ | June 30,
​ |  | 2019 |  | 2018 |  | 2019 |  | 2018
Network operations | ​ | $ | 348 | ​ | $ | 516 | ​ | $ | 854 | ​ | $ | 1,053
Development and technology | ​ |  | 334 | ​ |  | 314 | ​ |  | 637 | ​ |  | 592
Selling and marketing | ​ |  | 548 | ​ |  | 393 | ​ |  | 1,077 | ​ |  | 866
General and administrative | ​ |  | 806 | ​ |  | 1,723 | ​ |  | 1,812 | ​ |  | 3,561
Total stock-based compensation | ​ | $ | 2,036 | ​ | $ | 2,946 | ​ | $ | 4,380 | ​ | $ | 6,072
Summary of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted- |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Remaining | ​ | ​ | ​
​ | ​ | Number of | ​ | Average | ​ | Contract | ​ | Aggregate
​ | ​ | Options | ​ | Exercise | ​ | Life | ​ | Intrinsic
​ |  | (000’s) |  | Price |  | (years) |  | Value
Outstanding at December 31, 2018 |  | 304 | ​ | $ | 7.49 |  | 3.8 | ​ | $ | 3,970
Exercised |  | (15) | ​ | $ | 5.47 | ​ | ​ | ​ | ​ | ​
Canceled/forfeited |  | — | ​ | $ | — | ​ | ​ | ​ | ​ | ​
Outstanding and exercisable at June 30, 2019 |  | 289 | ​ | $ | 7.59 |  | 3.3 | ​ | $ | 2,999
Summary of RSU activity |
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average
​ | ​ | Number of Shares | ​ | Grant-Date Fair
​ |  | (000’s) |  | Value
Non-vested at December 31, 2018 |  | 3,119 | ​ | $ | 8.60
Granted(1) |  | 593 | ​ | $ | 22.76
Vested |  | (2,806) | ​ | $ | 7.21
Canceled/forfeited |  | (51) | ​ | $ | 23.31
Non-vested at June 30, 2019 |  | 855 | ​ | $ | 22.08
| (1) | The RSUs granted to all of our named executive officers in 2017 were subject to satisfaction of specified service-based and performance-based conditions. The performance objectives were subject to under- or over- achievement on a sliding scale, with a threshold of 50% of the target number of RSUs and a maximum of 150% of the target RSUs. In February 2019, our Compensation Committee determined actual achievement of the 2017 performance-based RSUs resulting in additional RSUs granted of approximately 29,000 at a grant-date fair value of $11.94 per share during the six months ended June 30, 2019.

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