Geographic Data - Schedule of Revenue by Geographic Areas (Details 2) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment, Net	$ 105,038	$ 99,401
United States | Geographic Distribution
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment, Net	53,767	53,950
China | Geographic Distribution
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment, Net	32,751	32,973
Taiwan | Geographic Distribution
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment, Net	4,593	3,752
Czech Republic | Geographic Distribution
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment, Net	10,946	5,976
Other non-U.S | Geographic Distribution
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment, Net	$ 2,981	$ 2,750