Note 4 - Fair Value Measurements (Details Textual)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Realized Investment Gains (Losses)	$ 0	$ (2,042,012)	$ 0	$ (11,114,481)
Unrealized Gain (Loss) on Investments	$ 287,405	$ 951,316	1,651,915	2,611,916
Fair Value, Inputs, Level 3 [Member]
Realized Investment Gains (Losses)			(0)	(11,114,481)	$ (15,238,313)
Unrealized Gain (Loss) on Investments			1,651,915	$ 2,611,916
Fair Value, Inputs, Level 3 [Member] | Maximum [Member]
Unrealized Gain (Loss) on Investments			$ 1,652,000		$ 6,091,000
Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation, Income Approach [Member]
Alternative Investment, Expected Collection Period (Year)			3 years		3 years
Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation, Income Approach [Member] | Measurement Input, Loss Severity [Member]
Alternative Investment, Measurement Input	0.30		0.30		0.30
Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation, Income Approach [Member]
Alternative Investment, Expected Collection Period (Year)			2 years		2 years
Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation, Income Approach [Member] | Measurement Input, Loss Severity [Member]
Alternative Investment, Measurement Input	0.15		0.15		0.15