Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Consolidated Statements of Operations
Revenue	$ 26,239	$ 24,302	$ 49,373	$ 48,489
Costs and operating expenses:
Network access	11,035	9,661	20,705	19,516
Network operations	4,753	3,748	8,704	7,202
Development and technology	2,726	2,834	5,862	5,492
Selling and marketing	3,822	2,419	6,812	4,670
General and administrative	3,811	3,157	8,301	6,484
Amortization of intangible assets	516	247	915	482
Total costs and operating expenses	26,663	22,066	51,299	43,846
(Loss) income from operations	(424)	2,236	(1,926)	4,643
Interest and other income, net	25	81	72	137
(Loss) income before income taxes	(399)	2,317	(1,854)	4,780
Income tax (benefit) expense	(173)	709	(640)	1,367
Net (loss) income	(226)	1,608	(1,214)	3,413
Net income attributable to non-controlling interests	173	147	306	295
Net (loss) income attributable to common stockholders	$ (399)	$ 1,461	$ (1,520)	$ 3,118
Net (loss) income per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.01)	$ 0.04	$ (0.04)	$ 0.09
Diluted (in dollars per share)	$ (0.01)	$ 0.04	$ (0.04)	$ 0.08
Weighted average shares used in computing net (loss) income per share attributable to common stockholders:
Basic (in shares)	35,670	34,799	35,634	34,384
Diluted (in shares)	35,670	37,403	35,634	37,321