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Note 9 - Fair Value - Fair Values for Investments (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Realized gains (losses)	$ 1,611	$ 740,892
Changes in fair values	228,619	4,411,489
Reported Value Measurement [Member]
Carrying amount	16,228,400	49,322,696
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Carrying amount	$ 16,228,400	$ 49,322,696

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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