Information about Geographic Areas (Tables)

9 Months Ended

Sep. 30, 2011

Revenue by Geography

	Three Months Ended September  30,				Nine Months Ended September 30,
	2010		2011		2010		2011
	(unaudited)
Revenues:
United States	$	3,517	$	4,420	$	10,001	$	12,580
United Kingdom		840		1,047		2,452		2,993
Rest of the world		2,929		4,253		8,428		11,749
Total revenues	$	7,286	$	9,720	$	20,881	$	27,322

Long Lived Assets by Geography

	As of December 31, 2010		As of September 30, 2011
			(unaudited)
Long-lived assets:
United States	$	14,000	$	15,664
International		2,289		3,382
Total long-lived assets	$	16,289	$	19,046