Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenue	$ 72,620	$ 49,438
Cost of revenue	42,725	28,874
Gross profit	29,895	20,564
Operating expenses:
Sales and marketing	13,537	8,141
Technology and development	7,509	4,193
General and administrative	21,751	11,956
Total operating expenses	42,797	24,290
Loss from operations	(12,902)	(3,726)
Other income (expense)
Interest expense, net	(28)	(11)
Total other income (expense)	(28)	(11)
Loss before income taxes	(12,930)	(3,737)
Income tax benefit (expense)	(17)	(16)
Net loss	(12,947)	(3,753)
Net loss attributable to common stockholders	(12,947)	(3,753)
Net loss per share:
Basic and diluted (in dollars per share)	$ (0.12)	$ (0.05)
Weighted average common shares outstanding:
Basic and diluted (in shares)	106,543	78,917
Stock-based compensation expense included above:
Stock-based compensation expense	3,772	1,657
Sales and marketing
Stock-based compensation expense included above:
Stock-based compensation expense	461	219
Technology and development
Stock-based compensation expense included above:
Stock-based compensation expense	170	855
General and administrative
Stock-based compensation expense included above:
Stock-based compensation expense	$ 3,141	$ 583