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Note 8 - Financial Highlights (Details Textual) - $ / shares
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
 [2]
Investment Company, Investment Income (Loss), Per Share, Basic (in dollars per share) [1] $ (0.01) $ (0)
Minimum [Member]    
Investment Company, Investment Income (Loss), Per Share, Basic (in dollars per share) $ 0.005  
[1] Based on average Shares outstanding during the period.
[2] Amount is greater than $(0.005).