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INVESTMENTS - Fair Value Measurement Inputs and Valuation Techniques (Details) $ in Thousands | Mar. 31, 2024 USD ($) | Sep. 30, 2023 USD ($)
--- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | $ 791,588 | $ 704,815 | [1]
Leeds Acquisition Holdings, LLC |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 200 | 200 |
Funko Acquisition Holdings, LLC |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 18,000 | 22 |
Significant Unobservable Inputs (Level 3) |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 791,324 | 704,562 |
Significant Unobservable Inputs (Level 3) | Secured first lien debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 288 | 0 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Secured first lien debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 508,803 | 461,638 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Secured second lien debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | $ 125,549 | $ 110,820 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured first lien debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.116 | 0.118 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured first lien debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.181 | 0.299 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured first lien debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.134 | 0.148 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured second lien debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.125 | 0.125 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured second lien debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.154 | 0.156 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured second lien debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.139 | 0.145 |
Significant Unobservable Inputs (Level 3) | TEV | Secured first lien debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | $ 54,758 | $ 49,063 |
Significant Unobservable Inputs (Level 3) | TEV | Secured second lien debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 7,345 | 7,425 |
Significant Unobservable Inputs (Level 3) | TEV | Unsecured debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 33 | 24 |
Significant Unobservable Inputs (Level 3) | TEV | Preferred and common equity / equivalents |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | $ 87,033 | $ 65,983 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA multiple | Secured first lien debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 4 | 4.7 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA multiple | Secured first lien debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 8 | 6.8 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA multiple | Secured first lien debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 7.3 | 6.7 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA multiple | Secured second lien debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 5.2 | 5.6 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA multiple | Secured second lien debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 5.2 | 5.6 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA multiple | Secured second lien debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 5.2 | 5.6 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA multiple | Preferred and common equity / equivalents | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 4 | 4.7 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA multiple | Preferred and common equity / equivalents | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 13.2 | 13 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA multiple | Preferred and common equity / equivalents | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 6.8 | 6.9 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA | Secured first lien debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | $ 1,091 | $ 995 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA | Secured first lien debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 15,145 | 14,002 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA | Secured first lien debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 11,772 | 13,624 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA | Secured second lien debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 3,778 | 3,690 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA | Secured second lien debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 3,778 | 3,690 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA | Secured second lien debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 3,778 | 3,690 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA | Preferred and common equity / equivalents | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 1,091 | 995 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA | Preferred and common equity / equivalents | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 140,548 | 112,841 |
Significant Unobservable Inputs (Level 3) | TEV | EBITDA | Preferred and common equity / equivalents | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | $ 9,630 | $ 10,570 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue multiple | Secured first lien debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.4 | 0.3 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue multiple | Secured first lien debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.8 | 0.8 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue multiple | Secured first lien debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.6 | 0.6 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue multiple | Unsecured debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 1 | 1 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue multiple | Unsecured debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 1 | 1 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue multiple | Unsecured debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 1 | 1 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue multiple | Preferred and common equity / equivalents | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.6 | 0.3 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue multiple | Preferred and common equity / equivalents | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 3.3 | 3 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue multiple | Preferred and common equity / equivalents | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 2 | 1.2 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue | Secured first lien debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | $ 9,160 | $ 14,934 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue | Secured first lien debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 31,586 | 16,283 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue | Secured first lien debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 17,957 | 15,361 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue | Unsecured debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 6,980 | 5,044 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue | Unsecured debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 6,980 | 5,044 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue | Unsecured debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 6,980 | 5,044 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue | Preferred and common equity / equivalents | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 4,102 | 4,213 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue | Preferred and common equity / equivalents | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 31,586 | 16,283 |
Significant Unobservable Inputs (Level 3) | TEV | Revenue | Preferred and common equity / equivalents | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | 16,716 | 14,959 |
Significant Unobservable Inputs (Level 3) | Market Quote | Secured second lien debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments owned, fair value | $ 7,515 | $ 9,609 |
Significant Unobservable Inputs (Level 3) | Market Quote | IBP | Secured second lien debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.840 | 0.678 |
Significant Unobservable Inputs (Level 3) | Market Quote | IBP | Secured second lien debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.900 | 0.940 |
Significant Unobservable Inputs (Level 3) | Market Quote | IBP | Secured second lien debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investment owned, measurement input | 0.865 | 0.822 |
[1] | Cumulative gross unrealized depreciation for federal income tax purposes is $56.9 million; cumulative gross unrealized appreciation for federal income tax purposes is $33.7 million. Cumulative net unrealized depreciation is $23.2 million, based on a tax cost of $728.0 million.

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