Concentration of Risk, Segment and Geographic Information (Tables)

12 Months Ended

Dec. 31, 2016

Concentration Of Risk Segment And Geographic Information [Abstract]

Revenue by Geographical Region

Revenue attributed to the following geographic regions for the years ended December 31, 2016, 2015, and 2014 was as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
United States	$	3,822	$	10,685	$	11,756
Europe		1,642		44,662		5,510
Asia Pacific		100		100		1,600
Total	$	5,564	$	55,447	$	18,866