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Fair Value Measurements - Schedule of Investments that Use Level 3 Inputs (Details) - Level 3 [Member] - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Schedule of Investments that Use Level 3 Inputs [Line Items] |  |
Balance at beginning | $ 140,290 | $ 165,316
Purchases and other adjustments to cost | 153,047 | 115,736
Sales (including repayments or maturities) | (53,090) | (123,035)
Net realized gains/(losses) from investments | (13,372) | 6,603
Net unrealized gains/(losses) | 5,307 | (1,201)
Transfer in/(out) | (7,995) | (23,129)
Balance at ending | 224,187 | 140,290
Senior Secured First Lien Term Loans [Member] |  |
Schedule of Investments that Use Level 3 Inputs [Line Items] |  |
Balance at beginning | 68,987 | 82,499
Purchases and other adjustments to cost | 68,553 | 31,590
Sales (including repayments or maturities) | (36,901) | (32,879)
Net realized gains/(losses) from investments | (11,601) | (8,728)
Net unrealized gains/(losses) | 7,826 | 19,634
Transfer in/(out) | (7,883) | (23,129)
Balance at ending | 88,981 | 68,987
Senior Secured Notes [Member] |  |
Schedule of Investments that Use Level 3 Inputs [Line Items] |  |
Balance at beginning | 7,422 |
Purchases and other adjustments to cost |  | 34,000
Sales (including repayments or maturities) | (425) | (26,578)
Net realized gains/(losses) from investments |  |
Net unrealized gains/(losses) |  |
Transfer in/(out) |  |
Balance at ending | 6,997 | 7,422
Equities/ Warrants [Member] |  |
Schedule of Investments that Use Level 3 Inputs [Line Items] |  |
Balance at beginning | 63,881 | 82,817
Purchases and other adjustments to cost | 84,494 | 50,146
Sales (including repayments or maturities) | (15,764) | (63,578)
Net realized gains/(losses) from investments | (1,771) | 15,331
Net unrealized gains/(losses) | (2,519) | (20,835)
Transfer in/(out) | (112) |
Balance at ending | $ 128,209 | $ 63,881

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- Definition Amount of purchases of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2G -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2G Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of sales of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of transfers of financial instrument classified as a liability into (out of) level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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