Note 3 - Intangible Assets (Details Textual) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets, Remaining Amortization Period (Year)	5 years 9 months 18 days
Amortization of Intangible Assets	$ 36,067	$ 30,360
Finite-Lived Intangible Asset, Expected Amortization, Year One	31,000
Finite-Lived Intangible Asset, Expected Amortization, Year Two	31,000
Finite-Lived Intangible Asset, Expected Amortization, Year Three	22,000
Finite-Lived Intangible Asset, Expected Amortization, Year Four	22,000
Finite-Lived Intangible Asset, Expected Amortization, Year Five	$ 22,000
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	10 years
Minimum [Member] \| Trademarks And Patents [Member]
Finite-Lived Intangible Asset, Useful Life	10 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	20 years
Maximum [Member] \| Trademarks And Patents [Member]
Finite-Lived Intangible Asset, Useful Life	20 years

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 50
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-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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-Paragraph 2
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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

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