Stock incentive plans (Tables)

9 Months Ended

Sep. 30, 2016

Stock incentive plans

Schedule of stock-based compensation expense

	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Network operations	$	483	$	336	$	1,660	$	1,095
Development and technology	267		319		830		546
Selling and marketing	424		600		1,431		1,769
General and administrative	1,832		1,001		5,769		2,780
Total stock-based compensation	$	3,006	$	2,256	$	9,690	$	6,190

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, 2015	3,748		$	6.89	5.0	$	6,611
Exercised	(365	)	$	5.43
Canceled/forfeited	(56	)	$	7.37
Outstanding at September 30, 2016	3,327		$	7.04	4.2	$	13,878
Vested, exercisable and expected to vest at September 30, 2016	3,318		$	7.04	4.1	$	13,858
Exercisable at September 30, 2016	3,156		$	7.08	4.0	$	13,206

Summary of nonvested RSU activity

	Number of Shares (000’s)		Weighted Average Grant-Date Fair Value
Non-vested at December 31, 2015	1,819		$	6.39
Granted	3,119		$	6.31
Vested	(866	)	$	6.89
Canceled/forfeited	(124	)	$	7.04
Non-vested at September 30, 2016	3,948		$	6.47