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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, 2019	Dec. 31, 2018
U.S. Treasury notes, Cost	$ 75,488,863	$ 86,728,590
U.S. Treasury notes, Gross Unrealized Loss	(79,664)
U.S. Treasury notes, Fair Value	$ 75,409,199	86,845,386
U.S. Treasury notes, Gross Unrealized Gain		$ 116,796

X

- Definition

Amount, before tax, of unrealized gain 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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