XML 29 R12.htm IDEA: XBRL DOCUMENT v3.8.0.1
Patents
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Patents

6. Patents

Included in other assets at December 31, 2017 and 2016 are capitalized patent costs as follows:

 

 

2017

 

2016

 

 

 

 

 

 

 

 

 

Patent costs

 

$

558,873

 

$

482,142

 

Less accumulated amortization

 

 

(62,153

)

 

(47,555

)

 

 

$

496,720

 

$

434,587

 


Amortization expense for the year ended December 31, 2017 and 2016 amounted to $14,598 and $14,043, respectively.