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Affiliates and Controlled Investments - Schedule of Fair Value with Transactions in Affiliated investments and controlled investments (Parenthetical) (Details)
 9 Months Ended
Sep. 30, 2025
Non-Controlled, Affiliated Investments | Common Equity (5.05% of class) | PFS Holdings Corp  
Schedule of Investments [Line Items]  
Percentage of class 5.05%
Controlled Investments | Equity (87.5% of class) | Great Elm Specialty Finance  
Schedule of Investments [Line Items]  
Percentage of class 87.50%
Controlled Investments | Equity (71.25% of class) | CLO Formation JV, LLC  
Schedule of Investments [Line Items]  
Percentage of class 71.25%