Concentration of Risk, Segment and Geographic Information (Tables)

12 Months Ended

Dec. 31, 2013

Concentration of Risk, Segment and Geographic Information [Abstract]

Revenue by geographical region

Revenue attributed to the following geographic regions for each of the three years ended December 31, 2013, 2012 and 2011 was as follows (in thousands):

	Year ended December 31,
	2013		2012		2011
United States	$	19,955	$	14,134	$	20,447
Europe		15,396		18,454		35,718
Asia Pacific		100		1,194		2,031
Total	$	35,451	$	33,782	$	58,196