Note 6 - Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Finite-Lived Intangible Assets [Table Text Block]

2018
Intangible Assets	Weighted Average Amortization Period		Cost		Accumulated Amortization		Carrying Amount
Patents, Copyrights and Intellectual Property		14	$	796,080	$	300,528	$	495,552
Licensing Agreement		5		10,000		10,000		0
Certifications		4		58,486		58,486		0
Totals			$	864,566	$	369,014	$	495,552

2017
Intangible Assets	Weighted Average Amortization Period		Cost		Accumulated Amortization		Carrying Amount
Patents, Copyrights and Intellectual Property		18	$	839,831	$	177,669	$	662,162
Licensing Agreement		5		10,000		10,000		0
Certifications		3		58,722		58,722		0
Other		5		21,492		21,492		0
Totals			$	930,045	$	267,883	$	662,162

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Year Ended
2019	$	121,613
2020		121,613
2021		121,613
2022		36,613
2023		36,613
Thereafter		57,487
Total	$	495,552