Stock incentive plans (Tables)

6 Months Ended

Jun. 30, 2017

Stock incentive plans

Schedule of stock-based compensation expense

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Network operations	$	562	$	531	$	1,108	$	1,177
Development and technology	280		251		550		563
Selling and marketing	639		458		1,065		1,007
General and administrative	2,807		1,839		4,609		3,937
Total stock-based compensation	$	4,288	$	3,079	$	7,332	$	6,684

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, 2016	3,084		$	7.04	3.8	$	17,145
Exercised	(818	)	$	4.43
Canceled/forfeited	(20	)	$	6.71
Outstanding at June 30, 2017	2,246		$	7.99	3.5	$	15,658
Exercisable at June 30, 2017	2,212		$	8.02	3.5	$	15,355

Summary of RSU activity

	Number of Shares (000’s)		Weighted Average Grant-Date Fair Value
Non-vested at December 31, 2016	3,825		$	6.55
Granted	586		$	12.57
Vested	(636	)	$	7.21
Canceled/forfeited	(98	)	$	8.23
Non-vested at June 30, 2017	3,677		$	7.35