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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 ($)	Mar. 31, 2024	Dec. 31, 2023
U.S. Treasury notes, Cost	$ 13,499,672	$ 47,162,564
U.S. Treasury notes, Gross Unrealized Gain (Loss)	63,354	(49,905)
U.S. Treasury notes, Fair Value	$ 13,563,026	$ 47,112,659

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