Stock incentive plans (Tables)

3 Months Ended

Mar. 31, 2015

Share-based Compensation Arrangement by Share-based Payment Award

Schedule of stock-based compensation expense

	Three Months Ended March 31,
	2015		2014
Network operations	$	347	$	288
Development and technology	98		141
Selling and marketing	527		334
General and administrative	863		754
Total stock-based compensation	$	1,835	$	1,517

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	(147	)	$	1.97
Canceled/forfeited	(37	)	$	9.21
Outstanding at March 31, 2015	4,157		$	6.74	5.6	$	9,783
Vested, exercisable and expected to vest at March 31, 2015	4,100		$	6.73	5.6	$	9,732
Exercisable at March 31, 2015	3,067		$	6.16	4.9	$	9,023

Restricted stock unit awards

Share-based Compensation Arrangement by Share-based Payment Award

Summary of nonvested RSU activity under the 2011 Plan

	Number of Shares (000’s)		Weighted Average Grant-Date Fair Value
Nonvested at December 31, 2014	1,385		$	6.09
Granted	1,228		$	7.31
Vested	(239	)	$	7.26
Canceled/forfeited	(25	)	$	6.94
Nonvested at March 31, 2015	2,349		$	6.71