Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Consolidated Statements of Operations
Revenue	$ 37,186	$ 30,822	$ 100,855	$ 85,670
Costs and operating expenses:
Network access	17,517	15,058	47,151	41,230
Network operations	8,219	6,245	24,160	17,862
Development and technology	5,001	3,965	13,978	10,805
Selling and marketing	4,793	3,778	13,990	11,629
General and administrative	5,472	4,304	16,994	13,344
Amortization of intangible assets	943	959	2,709	2,812
Total costs and operating expenses	41,945	34,309	118,982	97,682
Loss from operations	(4,759)	(3,487)	(18,127)	(12,012)
Interest and other (expense) income, net	(49)	11	(50)	12
Loss before income taxes	(4,808)	(3,476)	(18,177)	(12,000)
Income tax expense	115	75	401	378
Net loss	(4,923)	(3,551)	(18,578)	(12,378)
Net (loss) income attributable to non-controlling interests	(104)	264	60	619
Net loss attributable to common stockholders	$ (4,819)	$ (3,815)	$ (18,638)	$ (12,997)
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.13)	$ (0.11)	$ (0.51)	$ (0.36)
Diluted (in dollars per share)	$ (0.13)	$ (0.11)	$ (0.51)	$ (0.36)
Weighted average shares used in computing net loss per share attributable to common stockholders:
Basic (in shares)	37,041	35,881	36,722	35,619
Diluted (in shares)	37,041	35,881	36,722	35,619