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Note 9 - Fair Value - Fair Values for Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Realized gains (losses)	$ 740,892	$ (9,485,637)
Changes in fair values	4,411,489	(6,150,053)
Reported Value Measurement [Member]
Carrying amount	49,322,696	42,289,339
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Carrying amount	$ 49,322,696	$ 42,289,339

X

- Definition

Amount of unrealized and realized gain (loss) on investment in debt and equity securities.

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Amount of realized gain (loss) on investment in debt and equity securities.

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