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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, 2022
Dec. 31, 2021
U.S. Treasury notes, Cost $ 24,444,170 $ 87,541,764
U.S. Treasury notes, Gross Unrealized Gain (Loss) (154,078) 3,140
U.S. Treasury notes, Fair Value $ 24,290,092 $ 87,544,904