Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Condensed Consolidated Statements of Operations
Revenue	$ 53,655	$ 40,796	$ 147,021	$ 114,370
Costs and operating expenses:
Network access	24,143	17,982	64,655	49,575
Network operations	11,625	10,698	34,556	31,566
Development and technology	6,817	5,394	19,814	16,014
Selling and marketing	5,201	4,553	15,188	14,103
General and administrative	8,006	6,701	27,372	22,553
Amortization of intangible assets	852	855	2,673	2,582
Total costs and operating expenses	56,644	46,183	164,258	136,393
Loss from operations	(2,989)	(5,387)	(17,237)	(22,023)
Interest and other expense, net	(84)	(117)	(126)	(299)
Loss before income taxes	(3,073)	(5,504)	(17,363)	(22,322)
Income tax expense	167	95	507	457
Net loss	(3,240)	(5,599)	(17,870)	(22,779)
Net income attributable to non-controlling interests	210	110	477	180
Net loss attributable to common stockholders	$ (3,450)	$ (5,709)	$ (18,347)	$ (22,959)
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.09)	$ (0.15)	$ (0.46)	$ (0.61)
Diluted (in dollars per share)	$ (0.09)	$ (0.15)	$ (0.46)	$ (0.61)
Weighted average shares used in computing net loss per share attributable to common stockholders:
Basic (in shares)	40,336	38,189	39,468	37,897
Diluted (in shares)	40,336	38,189	39,468	37,897