Note 7 - Patents

3 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Goodwill and Intangible Assets Disclosure [Text Block]

NOTE

7

 — PATENTS

    

	March 31, 2020
	Cost		Accumulated Amortization			Net
Patents-foundation intellectual property	$	1,377,863	$	(1,008,856	)	$	369,007
Total	$	1,377,863	$	(1,008,856	)	$	369,007

	December 31, 2019
	Cost		Accumulated Amortization			Net
Patents-foundation intellectual property	$	1,377,863	$	(995,603	)	$	382,260
Total	$	1,377,863	$	(995,603	)	$	382,260

Patents are amortized utilizing the straight-line method over estimated useful lives ranging from

3

to

20

years. Amortization expense was

$13,252

 for the

three

months ended

March 31, 2020

and

2019,

respectively.