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INVESTMENTS - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details) $ in Thousands | Sep. 30, 2025 USD ($) | Mar. 31, 2025 USD ($)
--- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | $ 1,130,859 | $ 979,320 | [1]
Investments at fair value | 1,130,859 | 979,320 |
Secured First Lien Debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 593,979 | 514,334 |
Secured Second Lien Debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 90,633 | 103,580 |
Preferred Equity |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 365,278 | 302,163 |
Common Equity/ Equivalents |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 75,894 | 54,268 |
Significant Unobservable Inputs (Level 3) |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 1,125,784 | 974,345 |
Investments at fair value | 1,125,784 | 974,345 |
Significant Unobservable Inputs (Level 3) | Secured First Lien Debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 593,979 | 514,334 |
Significant Unobservable Inputs (Level 3) | Secured Second Lien Debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 90,633 | 103,580 |
Significant Unobservable Inputs (Level 3) | Preferred Equity |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 365,278 | 302,163 |
Significant Unobservable Inputs (Level 3) | Common Equity/ Equivalents |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 75,894 | 54,268 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Secured First Lien Debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 593,979 | 514,334 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Secured Second Lien Debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 90,633 | 90,956 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Preferred Equity |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 365,278 | 302,163 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Common Equity/ Equivalents |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | $ 75,894 | $ 54,268 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Secured First Lien Debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 3.5 | 3.7 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Secured First Lien Debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 8.0 | 7.9 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Secured First Lien Debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 6.2 | 6.0 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Secured Second Lien Debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 5.0 | 6.1 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Secured Second Lien Debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 7.3 | 7.2 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Secured Second Lien Debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 6.6 | 6.8 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Preferred Equity | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 3.5 | 3.7 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Preferred Equity | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 8.0 | 7.9 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Preferred Equity | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 6.2 | 6.1 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Common Equity/ Equivalents | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 5.0 | 5.5 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Common Equity/ Equivalents | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 7.3 | 7.2 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA multiple | Common Equity/ Equivalents | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 6.9 | 6.8 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured First Lien Debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | $ 538 | $ 1,208 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured First Lien Debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 23,126 | 25,038 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured First Lien Debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 11,372 | 12,162 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured Second Lien Debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 5,130 | 3,637 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured Second Lien Debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 31,248 | 24,234 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured Second Lien Debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 20,921 | 16,900 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Preferred Equity | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 538 | 2,153 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Preferred Equity | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 23,126 | 25,038 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Preferred Equity | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 9,778 | 11,029 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Common Equity/ Equivalents | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 714 | 1,208 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Common Equity/ Equivalents | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 31,248 | 24,234 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Common Equity/ Equivalents | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | $ 22,994 | $ 18,562 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Secured First Lien Debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 0.3 | 0.3 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Secured First Lien Debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 0.6 | 0.6 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Secured First Lien Debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 0.5 | 0.4 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Preferred Equity | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 0.3 | 0.3 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Preferred Equity | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 0.6 | 0.6 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Preferred Equity | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input | 0.4 | 0.4 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Secured First Lien Debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | $ 21,649 | $ 6,690 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Secured First Lien Debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 104,790 | 102,791 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Secured First Lien Debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 65,258 | 72,303 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Preferred Equity | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 21,649 | 6,690 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Preferred Equity | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 104,790 | 102,791 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Preferred Equity | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | 79,691 | 53,604 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Secured Second Lien Debt |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Investments at fair value | $ 0 | $ 12,624 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured Second Lien Debt | Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input |  | 0.207 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured Second Lien Debt | Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input |  | 0.207 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured Second Lien Debt | Weighted Average |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value, measurement input |  | 0.207 |
[1] | Cumulative gross unrealized appreciation for federal income tax purposes is $183.3 million; cumulative gross unrealized depreciation for federal income tax purposes is $144.9 million. Cumulative net unrealized appreciation is $38.5 million, based on a tax cost of $940.9 million.

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