v3.25.4

Significant Accounting Policies - Additional Information (Details) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jun. 04, 2024 USD ($) | Sep. 30, 2025 USD ($) Portfolio shares | Sep. 30, 2024 USD ($) Portfolio $ / shares shares | Sep. 30, 2023 USD ($)
Significant Accounting Policies [Line Items] |  |  |  |
Financing receivable, nonaccrual, percent past due on cost basis |  | 1.30% | 4.10% |
Financing receivable, nonaccrual, percent past due on fair value basis |  | 0.10% | 2.30% |
Provision for taxes on net investment income |  | $ 2,590 | $ 2,602 | $ 4,295
Net realized gain (loss) on investments |  | (52,460) | (33,833) | (151,516)
Proceeds from public offering |  | $ 0 | $ 552 | 0
Common stock, shares, issued | shares |  | 65,296,094 | 65,296,094 |
Offsetting losses expected to refund |  | $ 0 |  |
Holdings II [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Provision for taxes on net realized gain on investments |  | 100 | $ 200 | (5,000)
Provision for taxes on net unrealized gain on investments |  | 0 | (700) | 1,600
Provision for taxes on net realized and unrealized gains on investments |  | 100 | (500) | (3,400)
Federal Taxes |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Net realized gain (loss) on investments |  | $ 200 | $ 0 | $ 0
Equity Distribution Agreements |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Proceeds from public offering | $ 100,000 |  |  |
Common stock, shares, issued | shares |  |  | 71,594 |
Shares Issued Price Per Share | $ / shares |  |  | $ 7.72 |
Proceeds from Notes issuance |  |  | $ 600 |
Deferred Offering Costs |  |  | $ 300 |
Past Due 30 Days or More |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Number of portfolio on nonaccrual | Portfolio |  | 4 | 2 |

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- Definition Provision for taxes on net investment income. + References No definition available. + Details
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- Definition Provision for taxes on net realized and unrealized gains on investments. + References No definition available. + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- Definition Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 340 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.A) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480341/340-10-S99-1 + Details
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- Definition Percentage of nonaccrual financing receivable, excluding accrued interest, that is outstanding and past due. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-14 + Details
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- Definition The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 14 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-14 + Details
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