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Note 7 - Investments in Equity Securities - Summary of Investment in Equity Securities (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Balance $ 657,971 $ 1,518,244
Acquisitions, Dispositions and Settlements 0 0
Unrealized Gains Included in Earnings 53,614 (860,273)
Realized Gains Included in Earnings   0
Balance 665,301 $ 657,971
Realized Gains (Losses) Included in Earnings $ (46,284)