Note 7 - Patents (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

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

	September 30, 2021
	Cost		Accumulated Amortization			Net
Patents-foundation intellectual property	$	1,377,863	$	(1,082,674	)	$	295,189
Total	$	1,377,863	$	(1,082,674	)	$	295,189

	December 31, 2020
	Cost		Accumulated Amortization			Net
Patents-foundation intellectual property	$	1,377,863	$	(1,048,614	)	$	329,249
Total	$	1,377,863	$	(1,048,614	)	$	329,249