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Patents and Other Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill [Table Text Block]
Patents and other intangible assets are summarized as follows:
 
 
 
September 30,
 
 
December 31,
 
 
 
2018
 
 
2017
 
 
 
(unaudited)
 
 
 
 
Patents
 
 
 
 
 
 
 
 
 Patents pending
 
$
1,246,000
 
 
$
1,167,000
 
 Issued patents
 
 
1,120,000
 
 
 
930,000
 
 
 
 
2,366,000
 
 
 
2,097,000
 
Trademarks
 
 
 
 
 
 
 
 
 Trademarks pending
 
 
50,000
 
 
 
41,000
 
 Registered trademarks
 
 
23,000
 
 
 
23,000
 
 
 
 
73,000
 
 
 
64,000
 
Other
 
 
8,000
 
 
 
8,000
 
 
 
 
2,447,000
 
 
 
2,169,000
 
Accumulated amortization
 
 
(518,000
)
 
 
(313,000
)
 
 
$
1,929,000
 
 
$
1,856,000
 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Future amortization expense associated with issued patents and registered trademarks as of September 30, 2018 is estimated as follows (unaudited):
 
2018
 
$
69,000
 
2019
 
 
255,000
 
2020
 
 
165,000
 
2021
 
 
73,000
 
2022
 
 
38,000
 
Thereafter
 
 
25,000
 
 
 
$
625,000