Segment Reporting and Significant Customer Information - Assets by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Revenue for each segment recognized based on customer location
Long-lived assets	$ 8,376	$ 9,676
Total assets	70,971	93,433
Elimination
Revenue for each segment recognized based on customer location
Long-lived assets	0	0
Total assets	(62,555)	(24,529)
North America | Operating Segments
Revenue for each segment recognized based on customer location
Long-lived assets	7,014	7,678
Total assets	75,679	73,508
Europe | Operating Segments
Revenue for each segment recognized based on customer location
Long-lived assets	1,011	1,507
Total assets	52,023	40,818
Asia Pacific | Operating Segments
Revenue for each segment recognized based on customer location
Long-lived assets	351	491
Total assets	$ 5,824	$ 3,636