Goodwill and Other Intangible Assets (Summary of Goodwill Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Beginning balance	$ 31,105	$ 35,018
Adjustment to goodwill acquired		(1,700)
Impairment charges	(1,126)	(2,416)
Foreign currency translation adjustment	(52)	203
Goodwill acquired	15,903
Ending balance	45,830	31,105
KELK Acquisition | Measurement Systems
Goodwill [Roll Forward]
Beginning balance	6,726	6,559
Foreign currency translation adjustment	(20)	167
Ending balance	6,706	6,726
DSI Acquisition | Measurement Systems
Goodwill [Roll Forward]
Beginning balance	16,942	18,606
Adjustment to goodwill acquired		(1,700)
Foreign currency translation adjustment	(32)	36
Ending balance	16,910	16,942
Stress-Tek Acquisition | Measurement Systems
Goodwill [Roll Forward]
Beginning balance	6,311	6,311
Ending balance	6,311	6,311
Pacific Instruments Acquisition | Measurement Systems
Goodwill [Roll Forward]
Beginning balance	1,126	3,542
Impairment charges	(1,126)	(2,416)
Ending balance	0	$ 1,126
DTS Acquisition
Goodwill [Roll Forward]
Ending balance	15,903
DTS Acquisition | Measurement Systems
Goodwill [Roll Forward]
Goodwill acquired	15,903
Ending balance	$ 15,903