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Note 4 - Investment Management Fee (Details Textual) - USD ($)
12 Months Ended
Mar. 31, 2024
Sep. 30, 2023
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Management Fee Payable     $ 0 $ 127,478  
Management [Member]          
Management and Service Fees, Rate     2.00%    
Management and Service Fees, Incentive Rate     20.00%    
Increase (Decrease) in Incentive Fee Payable     $ 0 $ 0 $ 0
Management Fee Payable $ 3,000,000 $ 2,500,000      
Investment Company, Contractual Fee Waived $ 3,000,000 $ 2,500,000