Stock incentive plans (Tables)

12 Months Ended

Dec. 31, 2012

Stock incentive plans

Schedule of recognized stock-based compensation expense

	Years ended December 31,
	2012		2011		2010
Network operations	$	352	$	463	$	131
Development and technology		352		577		115
Selling and marketing		571		650		171
General and administrative		1,460		1,733		450
Total stock-based compensation expense	$	2,735	$	3,423	$	867

Schedule of stock option activity

A summary of the stock option activity under the 2001 and 2011 Plans are as follows:

	Number of Options (000's)			Weighted Average Exercise Price		Weighted- Average Remaining Contract Life (years)		Aggregate Intrinsic Value
Outstanding at December 31, 2009		5,281		$	1.25		7.3	$	8,471
Granted		53		$	2.85
Exercised		(2	)	$	0.90
Cancelled/forfeited		(44	)	$	1.45
Outstanding at December 31, 2010		5,288		$	1.25		6.3	$	38,279
Granted		2,381		$	13.02
Exercised		(1,015	)	$	1.01
Cancelled/forfeited		(53	)	$	6.58
Outstanding at December 31, 2011		6,601		$	5.50		7.0	$	30,996
Granted		1,391		$	8.29
Exercised		(1,899	)	$	1.36
Cancelled/forfeited		(1,048	)	$	11.85
Outstanding at December 31, 2012		5,045		$	6.50		6.44	$	14,742
Vested, exercisable and expected to vest at December 31, 2012		4,855		$	6.37		6.34	$	14,690
Exercisable at December 31, 2012		2,776		$	3.46		4.52	$	13,964