Note 6 - Fair Value - Schedule of Valuation Techniques and Assumptions (Details) Pure in Thousands		Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Investments, fair value		$ 225,436	$ 1,060,474
Fair Value, Inputs, Level 3 [Member]
Investments, fair value		169,165	315,250
Advanced Materials Sector [Member] | Fair Value, Inputs, Level 3 [Member]
Investments, fair value	[1]	200,000	300,000
Automotive Sector [Member] | Fair Value, Inputs, Level 3 [Member]
Investments, fair value	[1]	$ 0	$ 0
Automotive Sector [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation Technique, Liquidation Value [Member] | Measurement input, Market Value of Invested Capital [Member] | Weighted Average [Member]
Investment Company, Investment Owned, Measurement Input	[2]	0	0
Medical Devices Sector [Member] | Fair Value, Inputs, Level 3 [Member]
Investments, fair value	[1]	$ 0	$ 0
Equipment Leasing Sector [Member] | Fair Value, Inputs, Level 3 [Member]
Investments, fair value	[1]		0
Semiconductor Equipment Sector [Member] | Fair Value, Inputs, Level 3 [Member]
Investments, fair value	[1]	$ 0	$ 0
Semiconductor Equipment Sector [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation Technique, Recent Transaction [Member] | Measurement Input, Equity Proceeds from Private Transaction [Member] | Weighted Average [Member]
Investment Company, Investment Owned, Measurement Input	[2]	0	0

[1] As of December 31, 2023, the Fund used Liquidation Value and Market Comparable Companies approaches to value certain investments. As of December 31, 2024, the Fund discontinued these approaches in certain cases in which more reliable indications of value were developed.

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