Geographic Data - Schedule of Financial Information by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	$ 123,018	$ 113,777	$ 84,197	$ 103,075	$ 115,040	$ 115,651	$ 120,684	$ 117,625	$ 424,066	$ 468,999	$ 470,483
Geographic Distribution | United States
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales									241,823	279,904	313,489
Geographic Distribution | China
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales									88,129	87,342	79,380
Geographic Distribution | Singapore
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales									31,985	32,957	6,724
Geographic Distribution | Czech Republic
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales									27,143	33,214	36,528
Geographic Distribution | Taiwan
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales									21,849	19,810	20,802
Geographic Distribution | Other non-U.S.
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales									$ 13,137	$ 15,772	$ 13,560