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Segment Reporting
3 Months Ended
Mar. 31, 2019
Segment Reporting [Abstract]  
Segment Reporting Segment ReportingThe Company's automotive segment develops and manufactures digital vision and connected car products and electronics, including: automatic-dimming rearview mirrors with and without electronic features; non-auto dimming rearview mirrors with and without electronic features; and other electronics. The Company also develops and manufactures variably dimming windows for the aerospace industry and fire protection products for the commercial construction industry, which are combined into the "Other" segment shown below.
Three months ended March 31,
20192018
Revenue:
Automotive Products$455,798,643 $454,965,374 
Other12,790,354 10,454,731 
Total$468,588,997 $465,420,105 
Income from operations:
Automotive Products$116,952,700 $124,962,159 
Other4,643,631 3,553,174 
Total$121,596,331 $128,515,333