Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2013

Segment Reporting [Abstract]

Revenue by Geographic Area

Revenue by geographic area is based on the locations of our partners. The following table sets forth revenue by geographic area (in thousands):

	Year Ended December 31,
	2013		2012		2011
United States	$	42,535	$	34,591	$	37,896
Europe		106,386		46,600		33,584
Total revenue	$	148,921	$	81,191	$	71,480