Note 6 - Fair Value - Schedule of Valuation Techniques and Assumptions (Details)		Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Investments, fair value		$ 256,934	$ 1,060,474
Fair Value, Inputs, Level 3 [Member]
Investments, fair value		197,925
Fair Value, Inputs, Level 3 [Member] | Advanced Materials Sector [Member]
Investments, fair value	[1]	$ 0.2
Fair Value, Inputs, Level 3 [Member] | Advanced Materials Sector [Member] | Valuation, Market Approach [Member] | Measurement Input, Revenue Multiple [Member] | Minimum [Member]
Measurement Input	[1],[2]	0.8
Fair Value, Inputs, Level 3 [Member] | Advanced Materials Sector [Member] | Valuation, Market Approach [Member] | Measurement Input, Revenue Multiple [Member] | Weighted Average [Member]
Measurement Input	[1],[2]	0.9
Fair Value, Inputs, Level 3 [Member] | Advanced Materials Sector [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Maturity [Member]
Measurement Input	[1],[2]	5
Fair Value, Inputs, Level 3 [Member] | Advanced Materials Sector [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Price Volatility [Member]
Measurement Input	[1],[2]	0.50
Fair Value, Inputs, Level 3 [Member] | Advanced Materials Sector [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Risk Free Interest Rate [Member]
Measurement Input	[1],[2]	0.0374
Fair Value, Inputs, Level 3 [Member] | Advanced Materials Sector [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Discount for Lack of Marketability [Member]
Measurement Input	[2],[3]	0.228
Fair Value, Inputs, Level 3 [Member] | Automotive Sector [Member]
Investments, fair value		$ 0
Fair Value, Inputs, Level 3 [Member] | Automotive Sector [Member] | Valuation Technique, Liquidation Value [Member] | Measurement input, Market Value of Invested Capital [Member]
Measurement Input	[2]	0
Fair Value, Inputs, Level 3 [Member] | Equipment Leasing Sector [Member]
Investments, fair value		$ 0
Fair Value, Inputs, Level 3 [Member] | Equipment Leasing Sector [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Price Volatility [Member]
Measurement Input	[1],[2]	0.50
Fair Value, Inputs, Level 3 [Member] | Equipment Leasing Sector [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Risk Free Interest Rate [Member]
Measurement Input	[1],[2]	0.036
Fair Value, Inputs, Level 3 [Member] | Equipment Leasing Sector [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Expected Term [Member]
Measurement Input	[1],[2]	2
Fair Value, Inputs, Level 3 [Member] | Medical Devices Sector [Member]
Investments, fair value		$ 0
Measurement Input	[1],[2]	3
Fair Value, Inputs, Level 3 [Member] | Medical Devices Sector [Member] | Valuation, Market Approach [Member] | Measurement Input, Revenue Multiple [Member] | Minimum [Member]
Measurement Input	[1],[2]	0.5
Fair Value, Inputs, Level 3 [Member] | Medical Devices Sector [Member] | Valuation, Market Approach [Member] | Measurement Input, Revenue Multiple [Member] | Weighted Average [Member]
Measurement Input	[1],[2]	0.6
Fair Value, Inputs, Level 3 [Member] | Medical Devices Sector [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Risk Free Interest Rate [Member]
Measurement Input	[1],[2]	0.0361
Fair Value, Inputs, Level 3 [Member] | Medical Devices Sector [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Option Volatility [Member]
Measurement Input	[1],[2]	0.55
Fair Value, Inputs, Level 3 [Member] | Medical Devices Sector [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Going Concern Probability [Member]
Measurement Input	[1],[2]	0.05
Fair Value, Inputs, Level 3 [Member] | Medical Devices Sector [Member] | Valuation Technique, Recent Transaction [Member] | Measurement Input, Equity Proceeds from Private Transaction [Member]
Measurement Input	[2]	0
Fair Value, Inputs, Level 3 [Member] | Semiconductor Equipment Sector [Member]
Investments, fair value		$ 0

[1] An increase in the input would result in an increase in the security’s valuation; a decrease in the input would result in a decrease in the security’s valuation.

[2] Weighted average is calculated by weighting the significant unobservable input by the relative fair value of each investment in the category

[3] An increase in the input would result in a decrease in the security’s valuation; a decrease in the input would result in an increase in the security’s valuation.