Note 7 - Patents (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

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

	March 31, 2022
	Cost		Accumulated Amortization			Net
Patents-foundation intellectual property	$	1,377,863	$	(1,113,671	)	$	264,192
Total	$	1,377,863	$	(1,113,671	)	$	264,192

	December 31, 2021
	Cost		Accumulated Amortization			Net
Patents-foundation intellectual property	$	1,377,863	$	(1,100,244	)	$	277,619
Total	$	1,377,863	$	(1,100,244	)	$	277,619