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Business Acquisitions and Investments, Acquisition of Particulate Matter Sensor Business of Stoneridge, Inc. (Details) - USD ($) $ in Thousands | 1 Months Ended | 9 Months Ended
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Mar. 31, 2021 | Sep. 30, 2021
Soot Sensor [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 |  | $ 6,200
Soot Sensor [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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