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Fair Value Measurements (Details) - Schedule of Investments that Use Level 3 Inputs - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Balance at beginning | $ 165,316 | $ 146,675
Purchases and other adjustments to cost | 34,450 | 25,193
Sales (including repayments or maturities) | (53,752) | (24,305)
Net realized gains/(losses) from investments | (1,472) | (837)
Net unrealized gains/(losses) | 5,995 | 4,540
Transfer in/(out) |  |
Balance at ending | 150,537 | 151,266
Senior Secured First Lien Term Loans [Member] | Level 3 [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Balance at beginning | 82,499 | 74,252
Purchases and other adjustments to cost | 14,352 | 15,443
Sales (including repayments or maturities) | (30,946) | (3,657)
Net realized gains/(losses) from investments | (8,676) | 85
Net unrealized gains/(losses) | 22,752 | (2,964)
Transfer in/(out) |  |
Balance at ending | 79,981 | 83,159
Equities/ Warrants [Member] | Level 3 [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Balance at beginning | 82,817 | 69,816
Purchases and other adjustments to cost | 20,098 | 8,723
Sales (including repayments or maturities) | (22,806) | (18,041)
Net realized gains/(losses) from investments | 7,204 | (927)
Net unrealized gains/(losses) | (16,757) | 7,509
Transfer in/(out) |  |
Balance at ending | $ 70,556 | 67,080
Senior Secured Second Lien Term Loans [Member] | Level 3 [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Balance at beginning |  | 2,607
Purchases and other adjustments to cost |  |
Sales (including repayments or maturities) |  | (2,607)
Net realized gains/(losses) from investments |  | 5
Net unrealized gains/(losses) |  | (5)
Transfer in/(out) |  |
Balance at ending |  |
Fund Investment [Member] | Level 3 [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Purchases and other adjustments to cost |  | 1,027
Net realized gains/(losses) from investments |  |
Transfer in/(out) |  |
Balance at ending |  | $ 1,027

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