Intangible Assets (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2016

Dec. 31, 2015

Intangible Assets [Abstract]

Summary of intangible assets

	Weighted Average Remaining Amortization  Period (years)		Cost		Accumulated Amortization		Net Book Value
June 30, 2016
Licenses		3.2	$	462,234	$	347,314	$	114,920
Patents		0.8		1,893,185		1,850,209		42,976
Total			$	2,355,419	$	2,197,523	$	157,896
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

	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

Summary of annual amortization expense

	Amortization Expense
July 1 thru December 31, 2016	$	30,964
2017	$	61,800
2018	$	37,300
2019	$	27,832

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