Segment Reporting and Significant Customer Information - Assets by Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Revenue for each segment recognized based on customer location
Long-lived assets	$ 7,374	$ 7,920
Total assets	62,073	68,579
Elimination
Revenue for each segment recognized based on customer location
Long-lived assets	0	0
Total assets	(64,483)	(63,344)
Asia Pacific | Operating Segments
Revenue for each segment recognized based on customer location
Long-lived assets	322	369
Total assets	4,410	5,845
Europe | Operating Segments
Revenue for each segment recognized based on customer location
Long-lived assets	795	899
Total assets	48,499	54,452
North America | Operating Segments
Revenue for each segment recognized based on customer location
Long-lived assets	6,257	6,652
Total assets	$ 73,647	$ 71,626