Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue:
Consumer revenue	$ 449,193	$ 340,121	$ 254,678
Enterprise revenue	26,823	29,537	21,750
Total revenue	476,016	369,658	276,428
Cost of services	120,422	100,065	79,916
Gross profit	355,594	269,593	196,512
Costs and expenses:
Sales and marketing	213,984	162,363	122,989
Technology and development	50,973	40,015	29,543
General and administrative	75,673	42,125	24,629
Amortization of acquired intangible assets	8,898	7,909	6,258
Total costs and expenses	349,528	252,412	183,419
Income from operations	6,066	17,181	13,093
Other income (expense):
Interest expense	(353)	(353)	(3,677)
Interest income	281	124	30
Change in fair value of warrant liabilities	0	0	3,117
Change in fair value of embedded derivative	0	0	(2,785)
Other	(137)	(21)	(5)
Total other expense	(209)	(250)	(3,320)
Income before provision for income taxes	5,857	16,931	9,773
Income tax (benefit) expense	3,362	(37,524)	(13,730)
Net income	2,495	54,455	23,503
Accretion of convertible redeemable preferred stock	0	0	(9,378)
Beneficial conversion feature on convertible redeemable preferred stock	0	0	(2,452)
Net income allocable to convertible redeemable preferred stockholders	0	0	(5,504)
Net income available to common stockholders	$ 2,495	$ 54,455	$ 6,169
Net income available per share to common stockholders
Basic (in usd per share)	$ 0.03	$ 0.61	$ 0.18
Diluted (in usd per share)	$ 0.03	$ 0.57	$ 0.09
Weighted-average common shares outstanding:
Basic (shares)	92,733,496	88,635,832	35,081,863
Diluted (shares)	99,101,932	96,046,744	62,190,702