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v3.25.3

SUBSEQUENT EVENTS - Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 17, 2025 | Oct. 31, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023 | Oct. 15, 2025 | Aug. 31, 2023 | Sep. 30, 2022 | Sep. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of investments |  |  | $ 396,796 |  | $ 177,649 |  | $ 175,477 |  |  |  |  |  |  |  |  |  |  |
Committed capital, unfunded |  |  | 66,396 |  | 57,594 |  |  |  |  |  |  |  |  |  |  |  |  |
Investment owned, cost |  |  | 876,614 | [1] | 771,011 | [2] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  | $ 406,500 |  | $ 257,000 |  | $ 257,000 |  |  | $ 200,000 | $ 188,813 |  |  | $ 96,313 | $ 57,500 | $ 0 | $ 0 | $ 0
Notes Payable | 7.75% Notes due 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  | $ 57,000 |  |  |  |  |  |  |  |  |
Notes Payable | 5.125% Notes due 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 50,000 | $ 100,000 |  |  |  |  |
Subsequent Event | Notes Payable | 7.75% Notes due 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  | $ 57,000 |  |  |  |  |  |  |  |  |  |
Subsequent Event | Notes Payable | 5.125% Notes due 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 150,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Access Elevator, LLC (“Total Access”) | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of investments |  | 11,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Committed capital, unfunded |  | 9,850 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Leadpoint Business Services, LLC | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from the sale of investments |  | 28,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment company, prepayment fee |  | 300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sokol | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment owned, cost |  | 500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Realized investment gains |  | 1,800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sea Link International IRB, Inc | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from the sale of investments |  | 17,800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment company exit fee |  | 200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Turn Key Health Clinics, LLC | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of investments | $ 15,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Committed capital, unfunded | 5,000 | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sicilian Oven Holdings, LLC | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of investments | $ 26,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Cumulative gross unrealized depreciation for federal income tax purposes is $59.7 million; cumulative gross unrealized appreciation for federal income tax purposes is $34.1 million. Cumulative net unrealized depreciation is $25.5 million, based on a tax cost of $884.7 million.
[2] | Cumulative gross unrealized depreciation for federal income tax purposes is $66.1 million; cumulative gross unrealized appreciation for federal income tax purposes is $85.8 million. Cumulative net unrealized appreciation is $19.7 million, based on a tax cost of $776.5 million

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