Note 4 - Fair Value Measurements (Details Textual)	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Unrealized Gain (Loss) on Investments	$ 14,738,290	$ (34,855,545)
Fair Value, Inputs, Level 3 [Member]
Unrealized Gain (Loss) on Investments	$ (6,091,000)	$ (35,144,000)
Fair Value, Inputs, Level 3 [Member] | Valuation, Income Approach [Member] | Minimum [Member]
Alternative Investment, Expected Collection Period (Year)	2 years	2 years
Fair Value, Inputs, Level 3 [Member] | Valuation, Income Approach [Member] | Minimum [Member] | Measurement Input, Loss Severity [Member]
Alternative Investment, Measurement Input	0.15	0.15
Fair Value, Inputs, Level 3 [Member] | Valuation, Income Approach [Member] | Maximum [Member]
Alternative Investment, Expected Collection Period (Year)	3 years	3 years
Fair Value, Inputs, Level 3 [Member] | Valuation, Income Approach [Member] | Maximum [Member] | Measurement Input, Loss Severity [Member]
Alternative Investment, Measurement Input	0.30	0.30