Intangible Assets

3 Months Ended

Mar. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Note 5. Intangible Assets

The components of our intangible assets at March 31, 2016 are summarized below:


Intangible Asset Class	Cost		Accumulated Amortization			Net Carrying Amount		Weighted Average Amortization Period
Patents	$	160,436	$	(118,114	)	$	42,322	17 years

Amortization expense was approximately $3,500 in the first quarter of 2016 and approximately $21,000 for the similar period in 2015. Expected amortization expense for the year ended December 31, 2016 is approximately $14,000.

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	$	13,978
2017	$	8,306
2018	$	8,306
2019	$	8,306
2020	$	6,922