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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 ($)	Sep. 30, 2021	Dec. 31, 2020
U.S. Treasury notes, Cost	$ 50,995,742	$ 37,766,133
U.S. Treasury notes, Gross Unrealized Gain (Loss)	1,438	1,812
U.S. Treasury notes, Fair Value	$ 50,997,180	$ 37,767,945

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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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