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Goodwill and Other Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill The carrying value of Goodwill as of September 30, 2020 and December 31, 2019 was $311.2 million and $307.4 million, respectively.
Carrying Amount
Balance as of December 31, 2019$307,365,845 
Acquisitions3,850,711 
Divestitures— 
Impairments— 
Other — 
Balance as of September 30, 2020$311,216,556 
Schedule of Intangible Assets
The patents and intangible assets and related change in carrying values are set forth in the tables below:

As of September 30, 2020:
Other Intangible AssetsGrossAccumulated AmortizationNetAssumed Useful Life
Gentex Patents$38,011,452 $(23,982,357)$14,029,095 Various
Vaporsens Technology Licenses292,943 (35,002)257,941 Various
Other Intangible Assets
HomeLink® Trade Names and Trademarks
$52,000,000 $— $52,000,000 Indefinite
HomeLink® Technology
180,000,000 (105,000,000)75,000,000 12 years
Existing Customer Platforms43,000,000 (30,100,000)12,900,000 10 years
Exclusive Licensing Agreement96,000,000 — 96,000,000 Indefinite
Vaporsens In-Process R&D11,000,000 — 11,000,000 Indefinite
Air-Craftglass In-Process R&D1,011,399 — 1,011,399 Indefinite
Total Other Intangible Assets$383,011,399 $(135,100,000)$247,911,399 
Total Patents & Other Intangible Assets$421,315,794 $(159,117,359)$262,198,435 

As of December 31, 2019:

Other Intangible Assets
Gross
Accumulated Amortization
Net
Assumed Useful Life
Gentex Patents
$37,328,963 $(22,491,010)$14,837,953 Various
Other Intangible Assets
HomeLink® Trade Names and Trademarks
$52,000,000 $— $52,000,000 Indefinite
HomeLink® Technology
180,000,000 (93,750,000)86,250,000 12 years
Existing Customer Platforms43,000,000 (26,875,000)16,125,000 10 years
Exclusive Licensing Agreement
96,000,000 — 96,000,000 Indefinite
Total Other Intangible Assets$371,000,000 $(120,625,000)$250,375,000 
Total Patents & Other Intangible Assets$408,328,963 $(143,116,010)$265,212,953