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Unaudited Consolidated Schedule of Investments - Derivative Instruments (Parenthetical) - USD ($)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Sep. 30, 2023
Dec. 31, 2022
Schedule of Investments [Line Items]        
Unrealized Appreciation (Depreciation) $ (6,450,000)   $ 1,114,000  
Credit Support Agreements        
Schedule of Investments [Line Items]        
Notional Amount 123,000,000   123,000,000 $ 123,000,000
Value 54,200,000   54,200,000 53,086,000
Unrealized Appreciation (Depreciation)   $ (4,914,000) (3,800,000)  
MVC Credit Support Agreement        
Schedule of Investments [Line Items]        
Unrealized Appreciation (Depreciation)     3,200,000 (1,214,000)
Sierra Credit Support Agreement        
Schedule of Investments [Line Items]        
Unrealized Appreciation (Depreciation)     (7,000,000) (3,700,000)
Barings LLC | MVC Credit Support Agreement        
Schedule of Investments [Line Items]        
Notional Amount 23,000,000   23,000,000 23,000,000
Value 16,800,000   16,800,000 12,386,000
Unrealized Appreciation (Depreciation)   (1,214,000) 3,200,000 (1,214,000)
Barings LLC | Sierra Credit Support Agreement        
Schedule of Investments [Line Items]        
Notional Amount 100,000,000   100,000,000 100,000,000
Value $ 37,400,000   37,400,000 40,700,000
Unrealized Appreciation (Depreciation)   $ (3,700,000) $ (7,000,000) $ (3,700,000)