Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2016

Intangible Assets [Abstract]

Summary of intangible assets

	Weighted Average Remaining Amortization Period (years)	Cost		Accumulated Amortization		Net Book Value
March 31, 2016
Licenses	3.5	$	462,234	$	340,524	$	121,710
Patents	0.8		1,893,185		1,841,581		51,604
Total		$	2,355,419	$	2,182,105	$	173,314
December 31, 2015
Licenses	3.8	$	462,234	$	333,732	$	128,502
Patents	1.1		1,893,185		1,832,955		60,230
Total		$	2,355,419	$	2,166,687	$	188,732

Summary of annual amortization expense

	Amortization Expense
April 1 through December 31,2016	$	46,382
2017	$	61,800
2018	$	37,300
2019	$	27,832