Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2013

Intangible Assets [Abstract]

Summary of intangible assets

	Weighted Average Remaining Amortization Period (years)		Cost		Accumulated Amortization		Net Book Value
September 30, 2013
Licenses		7.0	$	462,234	$	272,391	$	189,843
Patents		2.8		1,893,185		1,394,262		498,923
Total		3.6	$	2,355,419	$	1,666,653	$	688,766
December 31, 2012
Licenses		7.7	$	462,234	$	252,019	$	210,215
Patents		3.3		1,893,185		1,247672		645,513
Total		4.2	$	2,355,419	$	1,499,691	$	855,728

Summary of annual amortization expense

	Amortization Expense
2013	$	222,800
2014	$	213,200
2015	$	61,800
2016	$	61,800
2017	$	20,800