Geographic Data - Schedule of Financial Information by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net Sales from continuing operations
Net Sales	$ 115,040	$ 115,651	$ 120,684	$ 117,625	$ 120,073	$ 118,859	$ 118,021	$ 113,530	$ 468,999	$ 470,483	$ 422,993
Property, Plant and Equipment, Net	105,038				99,401				105,038	99,401
United States | Geographic Distribution
Net Sales from continuing operations
Net Sales									279,904	313,489	287,092
Property, Plant and Equipment, Net	53,767				53,950				53,767	53,950
Singapore | Geographic Distribution
Net Sales from continuing operations
Net Sales									32,957	6,724	5,596
TAIWAN, PROVINCE OF CHINA | Geographic Distribution
Net Sales from continuing operations
Net Sales									19,810	20,802	18,586
Property, Plant and Equipment, Net	4,593				3,752				4,593	3,752
China | Geographic Distribution
Net Sales from continuing operations
Net Sales									87,342	79,380	66,510
Property, Plant and Equipment, Net	32,751				32,973				32,751	32,973
Czech Republic | Geographic Distribution
Net Sales from continuing operations
Net Sales									33,214	36,528	34,476
Property, Plant and Equipment, Net	10,946				5,976				10,946	5,976
Other non-U.S. | Geographic Distribution
Net Sales from continuing operations
Net Sales									15,772	13,560	$ 10,733
Property, Plant and Equipment, Net	$ 2,981				$ 2,750				$ 2,981	$ 2,750