Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Components of Intangible Assets

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

Intangible Asset Class	Cost		Accumulated Amortization			Net Carrying Amount		Weighted Average Amortization Period
Patents and licences	$	1,243,612	$	(928,446	)	$	315,166		15 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