Note 7 - Patents - Summary of Patents (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Patents, cost	$ 1,377,863	$ 1,377,863
Patents, accumulated amortization	(1,082,674)	(1,048,614)
Patents-foundation intellectual property	295,189	329,249
Foundation Intellectual Property Patents [Member]
Patents, cost	1,377,863	1,377,863
Patents, accumulated amortization	(1,082,674)	(1,048,614)
Patents-foundation intellectual property	$ 295,189	$ 329,249

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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