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Note 8 - Investments, Including Investments Accounted for Using the Equity Method - Available for Sale Securities (Details) - US Treasury Notes Securities [Member] - USD ($)
Dec. 31, 2023
Dec. 31, 2022
U.S. Treasury notes, Cost $ 47,162,564 $ 33,888,165
U.S. Treasury notes, Gross Unrealized Gain (Loss) (49,905) (367,764)
U.S. Treasury notes, Fair Value $ 47,112,659 $ 33,520,401