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Goodwill and Other Intangible Assets (Summary of Goodwill Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Beginning balance	$ 19,181	$ 18,717
Impairment charges	(2,500)
Foreign currency translation adjustment	(540)	464
Ending balance	16,141	19,181
KELK | Weighing and Control Systems
Goodwill [Roll Forward]
Beginning balance	6,828	6,364
Impairment charges	0
Foreign currency translation adjustment	(540)	464
Ending balance	6,288	6,828
Stress-Tek, Inc. | Weighing and Control Systems
Goodwill [Roll Forward]
Beginning balance	6,311	6,311
Impairment charges	0
Foreign currency translation adjustment	0	0
Ending balance	6,311	6,311
Pacific Instruments, Inc. | Foil Technology Products
Goodwill [Roll Forward]
Beginning balance	6,042	6,042
Impairment charges	(2,500)
Foreign currency translation adjustment	0	0
Ending balance	$ 3,542	$ 6,042

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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