INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2015

INTANGIBLE ASSETS [Abstract]

INTANGIBLE ASSETS

7. INTANGIBLE ASSETS

Intangible assets consist of the following:

	December 31,						Weighted Average Amortization Period
	2015			2014			(in Years)
Patents	$	958,604		$	912,862			0.4
Trademarks		50,208			50,208			1.8
License rights		6,718			6,718			0.0
Total		1,015,530			969,788
Less accumulated amortization		(944,444	)		(752,841	)
Intangible assets, net	$	71,086		$	216,947

Amortization expense for the years ended December 31, 2015 and 2014 was approximately $192,000 and $162,000, respectively. Amortization expense on existing intangible assets is estimated to be $63,000 for 2016, and $8,000 for 2017.