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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, 2022
Sep. 30, 2022
Borrowings (Details) - Schedule of consolidated statements of assets and liabilities [Line Items]    
Total debt issuance costs $ 5,413 $ 5,413
Amortized debt issuance costs 3,457 3,354
Unamortized debt issuance costs 1,956 2,059
2023 Notes [Member]    
Borrowings (Details) - Schedule of consolidated statements of assets and liabilities [Line Items]    
Total debt issuance costs 3,102 3,102
Amortized debt issuance costs 3,083 3,063
Unamortized debt issuance costs 19 39
2028 Notes [Member]    
Borrowings (Details) - Schedule of consolidated statements of assets and liabilities [Line Items]    
Total debt issuance costs 2,311 2,311
Amortized debt issuance costs 374 291
Unamortized debt issuance costs $ 1,937 $ 2,020