Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements of Operations
Revenue	$ 139,626	$ 119,297	$ 106,746
Costs and operating expenses:
Network access	62,988	59,411	47,245
Network operations	33,537	25,475	18,402
Development and technology	19,147	14,879	11,432
Selling and marketing	19,653	16,382	14,244
General and administrative	22,356	17,460	15,067
Amortization of intangible assets	3,576	3,716	2,250
Total costs and operating expenses	161,257	137,323	108,640
Loss from operations	(21,631)	(18,026)	(1,894)
Interest and other (expense) income, net	(66)	(41)	37
Loss before income taxes	(21,697)	(18,067)	(1,857)
Income tax expense	481	700	1,461
Net loss	(22,178)	(18,767)	(3,318)
Net income attributable to non-controlling interests	114	754	650
Net loss attributable to common stockholders	$ (22,292)	$ (19,521)	$ (3,968)
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.60)	$ (0.55)	$ (0.11)
Diluted (in dollars per share)	$ (0.60)	$ (0.55)	$ (0.11)
Weighted average shares used in computing net loss per share attributable to common stockholders:
Basic (in shares)	36,849	35,753	35,578
Diluted (in shares)	36,849	35,753	35,578