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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, 2022	Dec. 31, 2021
U.S. Treasury notes, Cost	$ 33,888,165	$ 87,541,764
U.S. Treasury notes, Gross Unrealized Gain (Loss)	(367,764)	3,140
U.S. Treasury notes, Fair Value	$ 33,520,401	$ 87,544,904

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- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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