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Intangible Assets
 9 Months Ended
Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets

Note 5. Intangible Assets

The components of our intangible assets at September 30, 2015 are summarized below:

 

Intangible Asset Class    Cost      Accumulated
Amortization		      Net
Carrying
Amount		      Weighted
Average
Amortization
Period

Patents and licenses

    $ 1,243,612       $ (949,283 )     $ 294,329       15 years

Amortization expense was approximately $21,000 in the third quarter of 2015 and expected amortization expense for the year ended December 31, 2015 is approximately $83,000.

The expected future annual amortization expense for each of the next five years based on current balances of our intangible assets is approximately as follows:

 

For the year ending December 31:       

2016

    $ 75,496   

2017

    $ 54,923   

2018

    $ 27,978   

2019

    $ 27,978   

2020

    $ 26,594