Condensed Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue:
Consumer revenue	$ 138,329	$ 109,338	$ 266,530	$ 210,333
Enterprise revenue	6,628	6,375	12,835	12,966
Total revenue	144,957	115,713	279,365	223,299
Cost of services	34,926	29,391	69,482	59,348
Gross profit	110,031	86,322	209,883	163,951
Costs and expenses:
Sales and marketing	69,541	58,353	146,620	114,892
Technology and development	16,666	12,926	33,532	25,655
General and administrative	20,876	15,373	39,831	28,708
Amortization of acquired intangible assets	2,083	2,231	4,167	4,462
Total costs and expenses	109,166	88,883	224,150	173,717
Income (loss) from operations	865	(2,561)	(14,267)	(9,766)
Other income (expense):
Interest expense	(87)	(88)	(176)	(175)
Interest income	162	56	279	116
Other	(103)	(6)	(183)	(17)
Total other expense	(28)	(38)	(80)	(76)
Income (loss) before provision for income taxes	837	(2,599)	(14,347)	(9,842)
Income tax (benefit) expense	317	(1,101)	(5,709)	(4,049)
Net income (loss)	$ 520	$ (1,498)	$ (8,638)	$ (5,793)
Net income (loss) per share
Basic (in dollars per share)	$ 0.01	$ (0.02)	$ (0.09)	$ (0.06)
Diluted (in dollars per share)	$ 0.01	$ (0.02)	$ (0.09)	$ (0.06)
Weighted-average common shares outstanding used in computing net income (loss) per share:
Basic (number of shares)	94,592,297	92,471,009	94,314,192	92,188,591
Diluted (number of shares)	100,288,872	92,471,009	94,314,192	92,188,591