Additional Financial Statement Information (Other Accrued Expenses) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Customer advance payments	$ 4,765	$ 2,873
Accrued restructuring	0	63
Goods received, not yet invoiced	2,998	2,553
Accrued taxes, other than income taxes	1,425	1,223
Accrued commissions	2,605	2,144
Accrued professional fees	1,336	1,169
Accrued technical warranty	761	780
Current accrued pension and other post retirement costs	709	611
Other	2,997	2,427
Other accrued expenses	$ 17,596	$ 13,843