Note 7 - Investments in Equity Securities - Summary of Investment in Equity Securities (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Balance	$ 1,518,244	$ 1,534,400
Acquisitions, Dispositions and Settlements	0	19,698
Unrealized Gains Included in Earnings	(860,273)	(188,615)
Realized Gains Included in Earnings	0	152,761
Balance	$ 657,971	$ 1,518,244

Amount of Acquisitions, Dispositions and Settlements related to equity security measured at fair value with change in fair value recognized in net income (FV-NI).

No definition available.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
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Amount of realized gain from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(3)(d))
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