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Borrowings (Details) - Schedule of Consolidated Statements of Assets and Liabilities - Level 1 [Member] - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Borrowings (Details) - Schedule of Consolidated Statements of Assets and Liabilities [Line Items]    
Total debt issuance costs at beginning of period $ 1,689 $ 2,059
Amortized debt issuance costs 84 370
Unamortized debt issuance costs 1,605 1,689
2023 Notes [Member]    
Borrowings (Details) - Schedule of Consolidated Statements of Assets and Liabilities [Line Items]    
Total debt issuance costs at beginning of period 39
Amortized debt issuance costs 39
Unamortized debt issuance costs
2028 Notes [Member]    
Borrowings (Details) - Schedule of Consolidated Statements of Assets and Liabilities [Line Items]    
Total debt issuance costs at beginning of period 1,689 2,020
Amortized debt issuance costs 84 331
Unamortized debt issuance costs $ 1,605 $ 1,689