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Business Acquisitions and Investments, Acquisition of Particulate Matter Sensor Business of Stoneridge, Inc. (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Mar. 31, 2021	Jun. 30, 2021
Particulate Matter Sensor Business of Stoneridge, Inc. [Member]
Allocation of the Purchase Price, Assets Acquired and Liabilities Assumed [Abstract]
Purchase Price	$ 2,138
Assets acquired and liabilities assumed [Abstract]
Inventory	1,032
Machinery and equipment, net	351
Intangible assets	755
Net assets acquired	2,138
Business Combination, Description [Abstract]
Revenues from acquisition date		$ 3,800
Particulate Matter Sensor Business of Stoneridge, Inc. [Member] | Customer Relationships [Member]
Assets acquired and liabilities assumed [Abstract]
Intangible assets	$ 800
Business Combination, Description [Abstract]
Estimated useful life of intangible assets		10 years
Tallinn, Estonia Facility [Member] | Plan [Member]
Allocation of the Purchase Price, Assets Acquired and Liabilities Assumed [Abstract]
Purchase Price		$ 800

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