Note 3 - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Intangible assets, Gross	$ 9,563,075	$ 9,562,399
Less: accumulated amortization	(9,404,266)	(9,368,199)
Intangible assets, net	158,809	194,200	$ 212,619
Core Technology [Member]
Intangible assets, Gross	8,567,448	8,567,448
Trademarks And Patents [Member]
Intangible assets, Gross	$ 995,627	$ 994,951

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

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

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-Name Accounting Standards Codification
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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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