Intangible Assets

12 Months Ended

Dec. 31, 2015

Intangible Assets [Abstract]

Intangible Assets

Note 3. Intangible Assets

The following is a summary of intangible assets which consists of licenses and patents:

	Weighted Average Remaining Amortization Period (Years)	Cost		Accumulated Amortization		Net Book Value
December 31, 2015
Licenses	3.8	$	462,234	$	333,732	$	128,502
Patents	1.1		1,893,185		1,832,955		60,230
Total	1.9	$	2,355,419	$	2,166,687	$	188,732
December 31, 2014
Licenses	4.7	$	462,234	$	306,495	$	155,739
Patents	1.9		1,893,185		1,638,975		254,210
Total	2.6	$	2,355,419	$	1,945,470	$	409,949

Amortization expense was $221,217 and $222,563 in 2015 and 2014, respectively.

Based on the balance of licenses and patents at December 31, 2015, the annual amortization expense for each of the succeeding four years is expected to approximate as follows:

Year	Amortization Expense
2016	$	61,800
2017	$	61,800
2018	$	37,300
2019	$	27,832

License fees and royalty payments are expensed annually as incurred, as the Company does not attribute any future benefits of such payments.