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Business Acquisitions and Investments (Details)
$ in Thousands
1 Months Ended 3 Months Ended
Mar. 31, 2021
USD ($)
Mar. 31, 2021
USD ($)
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 $ 1,032
Machinery and equipment, net 351 351
Intangible assets 755 755
Net assets acquired 2,138 2,138
Revenues from acquisition date   800
Particulate Matter Sensor Business of Stoneridge, Inc. [Member] | Maximum [Member]    
Assets acquired and liabilities assumed [Abstract]    
Anticipated revenue 14,000  
Particulate Matter Sensor Business of Stoneridge, Inc. [Member] | Minimum [Member]    
Assets acquired and liabilities assumed [Abstract]    
Anticipated revenue 12,000  
Particulate Matter Sensor Business of Stoneridge, Inc. [Member] | Customer Relationships [Member]    
Assets acquired and liabilities assumed [Abstract]    
Intangible assets $ 800 $ 800
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