Summary of Long-lived Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	$ 40,550	$ 40,088
UNITED STATES
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	34,907	32,988
Europe
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	4,014	5,318
CHINA
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	1,593	1,705
Asia Pacific And Other Non Us Countries
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	$ 36	$ 77