Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenue	$ 49,438	$ 32,930
Cost of revenue	28,874	19,916
Gross profit	20,564	13,014
Operating expenses:
Sales and marketing	8,141	4,646
Technology and development	4,193	2,649
General and administrative	11,956	8,710
Total operating expenses	24,290	16,005
Loss from operations	(3,726)	(2,991)
Interest and other expense:
Interest expense, net	(11)	(20)
Other expense		(957)
Total interest and other expense	(11)	(977)
Loss before income taxes	(3,737)	(3,968)
Income tax expense	(16)	(5)
Net loss	(3,753)	(3,973)
Accretion of dividends on redeemable convertible preferred stock		(1,328)
Net loss attributable to common stockholders	(3,753)	(5,301)
Net loss per share attributable to common stockholders:
Basic and diluted (in dollars per share)	$ (0.05)	$ (0.32)
Weighted average common shares outstanding:
Basic and diluted (in shares)	78,917	16,683
Stock-based compensation expense included above:
Stock-based compensation expense	1,657	1,084
Sales and marketing
Stock-based compensation expense included above:
Stock-based compensation expense	219	46
Technology and development
Stock-based compensation expense included above:
Stock-based compensation expense	855	384
General and administrative
Stock-based compensation expense included above:
Stock-based compensation expense	$ 583	$ 654