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Goodwill and Other Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill The carrying value of Goodwill as of March 31, 2021 and December 31, 2020 was $314.7 million and $311.9 million, respectively.
Carrying Amount
Balance as of December 31, 2020$311,922,787 
Acquisitions2,758,721 
Divestitures— 
Impairments— 
Other — 
Balance as of March 31, 2021$314,681,508 
Schedule of Intangible Assets The patents and intangible assets and related change in carrying values are set forth in the tables below:
As of March 31, 2021:
Other Intangible AssetsGrossAccumulated AmortizationNetAssumed Useful Life
Gentex Patents$38,906,267 $(25,116,962)$13,789,305 Various
Vaporsens Technology Licenses$315,425 $(54,062)$261,363 Various
Other Intangible Assets
HomeLink® Trade Names and Trademarks
$52,000,000 $— $52,000,000 Indefinite
HomeLink® Technology
180,000,000 (112,500,000)67,500,000 12 years
Existing Customer Platforms43,000,000 (32,250,000)10,750,000 10 years
Exclusive Licensing Agreement96,000,000 — 96,000,000 Indefinite
Vaporsens In-Process R&D11,000,000 — 11,000,000 Indefinite
Argil In- Process R&D6,278,132 — 6,278,132 Indefinite
Air-Craftglass In-Process R&D1,389,237 — 1,389,237 Indefinite
Guardian In-Process R&D11,994,440 — 11,994,440 Indefinite
Total Other Intangible Assets$401,661,809 $(144,750,000)$256,911,809 
Total Patents & Other Intangible Assets$440,883,501 $(169,921,024)$270,962,477 

As of December 31, 2020:

Other Intangible Assets
Gross
Accumulated Amortization
Net
Assumed Useful Life
Gentex Patents
$38,625,292 $(24,528,853)$14,096,439 Various
Vaporsens Technology Licenses$300,985 $(38,856)$262,129 Various
Other Intangible Assets
HomeLink® Trade Names and Trademarks
$52,000,000 $— $52,000,000 Indefinite
HomeLink® Technology
180,000,000 (108,750,000)71,250,000 12 years
Existing Customer Platforms43,000,000 (31,175,000)11,825,000 10 years
Exclusive Licensing Agreement
96,000,000 — 96,000,000 Indefinite
    Vaporsens In-Process R&D11,000,000 $— 11,000,000 Indefinite
    Argil In-Process R&D6,278,132 $— 6,278,132 Indefinite
    Air-Craftglass In-Process R&D1,394,995 $— 1,394,995 Indefinite
Total Other Intangible Assets$389,673,127 $(139,925,000)$249,748,127 
Total Patents & Other Intangible Assets$428,298,419 $(164,453,853)$263,844,566