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
Revenue	$ 32,279	$ 19,901	$ 90,087	$ 57,854
Cost of revenue	10,364	6,533	28,002	19,375
Gross profit	21,915	13,368	62,085	38,479
Marketing	6,312	5,648	18,911	16,065
Technology and development	6,125	4,015	16,435	11,669
Customer service and operations	3,497	2,885	9,839	7,862
General and administrative	3,392	2,357	9,354	6,229
Total operating expense	19,326	14,905	54,539	41,825
Income (loss) from operations	2,589	(1,537)	7,546	(3,346)
Other income (expense):
Interest expense	(588)	(387)	(1,534)	(989)
Interest income	46	23	123	67
Other expense	(1,002)	(374)	(945)	(111)
Income (loss) before provision for income taxes	1,045	(2,275)	5,190	(4,379)
(Benefit) provision for income taxes	(119)		15	2
Net income (loss)	$ 1,164	$ (2,275)	$ 5,175	$ (4,381)
Net income (loss) per share:
Basic	$ 0.03	$ (0.45)	$ 0.18	$ (0.87)
Diluted	$ 0.03	$ (0.45)	$ 0.14	$ (0.87)
Weighted-average shares used to compute net income (loss) per share:
Basic	33,880	5,056	28,686	5,042
Diluted	38,188	5,056	36,438	5,042