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Significant Accounting Policies - Additional Information (Details) $ in Thousands |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 11, 2023 USD ($) | Mar. 27, 2023 USD ($) | Dec. 31, 2023 USD ($) Portfolio shares | Dec. 31, 2022 USD ($) shares | Sep. 30, 2023 USD ($) Portfolio | Sep. 30, 2022
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Increase (Decrease) in Due to Affiliates |  |  | $ (74) | $ (1,486) |  |
Provision for taxes on net investment income |  |  | 200 | 500 |  |
Provision for taxes on unrealized appreciation (depreciation) on investments |  |  | 0 | 700 |  |
Deferred tax liability |  |  | 1,800 |  | $ 1,800 |
Net provision for taxes on realized gain on investments |  |  | 0 |  | 300 |
Provision for taxes on net realized gain on investments |  |  | $ 0 | $ 0 |  |
Excise tax percentage |  |  | 4.00% |  |  |
Effective tax rate before excise tax and income taxes |  |  | 0.00% |  |  |
Federal statutory rate |  |  | 21.00% |  |  |
Prepaid expenses and other assets |  |  | $ 20 |  | $ 894 |
Stock Issued During Period, Shares, New Issues | shares |  |  | 0 | 86,177 |  |
Equity Distribution Agreements [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Aggregate Offering Price | $ 250,000 |  |  |  |  |
End Of Period [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Net increase (decrease) in cash and cash equivalents |  |  |  | $ 2,100 |  |
Beginning Of Period [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Net increase (decrease) in cash and cash equivalents |  |  |  | $ 3,600 |  |
At The Market Offering [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares |  |  | 0 |  |  |
At The Market Offering [Member] | Equity Distribution Agreements [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Aggregate Offering Price |  | $ 100,000 |  |  |  |
Past Due 30 Days or More |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Financing receivable, nonaccrual, percent past due on cost basis |  |  | 0.10% |  |  | 0.90%
Financing receivable, nonaccrual, percent past due on fair value basis |  |  | 0.00% |  | 0.20% |
Number of portfolio on nonaccrual | Portfolio |  |  | 1 |  | 3 |

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