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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, 2021
Dec. 31, 2020
U.S. Treasury notes, Cost $ 87,541,764 $ 37,766,133
U.S. Treasury notes, Gross Unrealized Gain (Loss) 3,140 1,812
U.S. Treasury notes, Fair Value $ 87,544,904 $ 37,767,945