Summary of Long-lived Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	$ 77,556	$ 65,464
United States
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	28,750	32,029
GERMANY
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	32,376	17,777
Rest Of Europe
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	14,303	13,919
China
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	2,029	1,636
Rest of Asia-Pacific
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	$ 98	$ 103