Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

The components of our intangible assets at March 31, 2015 are summarized below:


Intangible Asset Class	Cost		Accumulated Amortization			Net Carrying Amount		Weighted Average Amortization Period
Patents	$	1,243,612	$	(907,585	)	$	336,027		17 years

Expected Future Annual Amortization Expense

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