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Note 8 - Fair Value - Fair Values for Investments (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Realized gains (losses)	$ 132,450	$ 1,063,730
Changes in fair values	97,356	1,029,051
Reported Value Measurement [Member]
Carrying amount	19,152,273	13,370,229
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Carrying amount	$ 19,152,273	$ 13,370,229

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- 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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