Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Consolidated Statements of Operations
Revenue	$ 28,607	$ 26,017	$ 77,980	$ 74,506
Costs and operating expenses:
Network access	13,670	10,061	34,375	29,577
Network operations	4,495	3,693	13,199	10,895
Development and technology	2,622	2,300	8,484	7,792
Selling and marketing	3,294	2,567	10,106	7,237
General and administrative	3,201	2,971	11,502	9,455
Amortization of intangible assets	541	296	1,456	778
Total costs and operating expenses	27,823	21,888	79,122	65,734
Income (loss) from operations	784	4,129	(1,142)	8,772
Interest and other (expense) income, net	(2)	33	70	170
Income (loss) before income taxes	782	4,162	(1,072)	8,942
Income tax expense (benefit)	258	1,101	(382)	2,468
Net income (loss)	524	3,061	(690)	6,474
Net income attributable to non-controlling interests	170	284	476	579
Net income (loss) attributable to common stockholders	$ 354	$ 2,777	$ (1,166)	$ 5,895
Net income (loss) per share attributable to common stockholders:
Basic (in dollars per share)	$ 0.01	$ 0.08	$ (0.03)	$ 0.17
Diluted (in dollars per share)	$ 0.01	$ 0.07	$ (0.03)	$ 0.16
Weighted average shares used in computing net income (loss) per share attributable to common stockholders:
Basic (in shares)	35,593	35,080	35,620	34,618
Diluted (in shares)	37,129	37,337	35,620	37,324