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Goodwill and Other Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
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, 2016:

Other Intangible Assets
Gross
Accumulated Amortization
Net
Assumed Useful Life
Gentex Patents
$
32,302,452

$
(15,791,045
)
$
16,511,407

various
 
 
 
 
 
Other Intangible Assets
 
 
 
 
HomeLink®Trade Names and Trademarks
$
52,000,000

$
—

$
52,000,000

Indefinite
HomeLink® Technology
180,000,000

(45,000,000
)
135,000,000

12 years
Existing Customer Platforms
43,000,000

(12,900,000
)
30,100,000

10 years
Exclusive Licensing Agreement
96,000,000

—

96,000,000

Indefinite
Total Other Intangible Assets
$
371,000,000

$
(57,900,000
)
$
313,100,000

 
 
 
 
 
 
Total Patents & Other Intangible Assets
$
403,302,452

$
(73,691,045
)
$
329,611,407

 


As of December 31, 2015:

Other Intangible Assets
Gross
Accumulated Amortization
Net
Assumed Useful Life
Gentex Patents
$
31,873,665

$
(13,890,202
)
$
17,983,463

various
 
 
 
 
 
HomeLink®Trade Names and Trademarks
$
52,000,000

$
—

$
52,000,000

Indefinite
HomeLink® Technology
180,000,000

(33,750,000
)
$
146,250,000

12 years
Existing Customer Platforms
43,000,000

(9,675,000
)
$
33,325,000

10 years
Exclusive Licensing Agreement
96,000,000

—

$
96,000,000

Indefinite
Total other identifiable intangible assets
$
371,000,000

$
(43,425,000
)
$
327,575,000

 
 
 
 
 
 
Total Patents & Other Intangible Assets
$
402,873,665

$
(57,315,202
)
$
345,558,463