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INVESTMENTS - Fair Value Measurement Inputs and Valuation Techniques (Details) $ in Thousands | Dec. 31, 2022 USD ($) | Mar. 31, 2022 USD ($)
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Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | $ 760,463 |  | $ 714,396 | [1]
Investment, Identifier [Axis]: B+T Group Acquisition, Inc. – Common Stock Warrants |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [2],[3],[4] |  |  | 921 |
Investment, Identifier [Axis]: B+T Group Acquisition, Inc. – Line of Credit |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 2,800 | [5],[6] | 2,800 | [3],[4],[7]
Investment, Identifier [Axis]: B+T Group Acquisition, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [2],[3],[4] |  |  | 14,746 |
Investment, Identifier [Axis]: B+T Group Acquisition, Inc. – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [3],[4],[7] |  |  | 14,000 |
Investment, Identifier [Axis]: B+T Group Acquisition, Inc.(L) – Common Stock Warrants |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[6],[8],[9] | 0 |  |  |
Investment, Identifier [Axis]: B+T Group Acquisition, Inc.(L) – Term Debt 2 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[6] | 14,000 |  |  |
Investment, Identifier [Axis]: B+T Group Acquisition, Inc.– Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[6],[9] | 2,653 |  |  |
Investment, Identifier [Axis]: Bassett Creek Services, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [2],[3] |  |  | 17,150 |
Investment, Identifier [Axis]: Bassett Creek Services, Inc. – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [3] |  |  | 48,000 |
Investment, Identifier [Axis]: Brunswick Bowling Products, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 35,255 | [5],[9] | 21,485 | [2],[3]
Investment, Identifier [Axis]: Brunswick Bowling Products, Inc. – Term Debt 1 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 17,700 | [5] | 17,700 | [3]
Investment, Identifier [Axis]: Brunswick Bowling Products, Inc. – Term Debt 2 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 6,850 | [5] | 6,850 | [3]
Investment, Identifier [Axis]: Counsel Press, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 27,539 | [5],[9] | 25,374 | [2],[3]
Investment, Identifier [Axis]: Counsel Press, Inc. – Term Debt 1 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 21,100 | [5] | 21,100 | [3]
Investment, Identifier [Axis]: Counsel Press, Inc. – Term Debt 2 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 6,400 | [5] | 6,400 | [3]
Investment, Identifier [Axis]: Country Club Enterprises, LLC - Guaranty |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [10] |  |  | 0 |
Investment, Identifier [Axis]: Country Club Enterprises, LLC – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [11] |  |  | 1,498 |
Investment, Identifier [Axis]: Dema/Mai Holdings, Inc - Preferred Equity |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[9] | 24,877 |  |  |
Investment, Identifier [Axis]: Dema/Mai Holdings, Inc – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5] | 38,250 |  |  |
Investment, Identifier [Axis]: Diligent Delivery Systems – Common Stock Warrants |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 2,249 | [5],[9] | 1,533 | [2],[3]
Investment, Identifier [Axis]: Diligent Delivery Systems – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 13,016 | [12] | 13,000 | [11]
Investment, Identifier [Axis]: Edge Adhesives Holdings, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 0 | [5],[6],[9] | 0 | [2],[3],[4],[7]
Investment, Identifier [Axis]: Edge Adhesives Holdings, Inc. – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [4],[11] |  |  | 9,072 |
Investment, Identifier [Axis]: Edge Adhesives Holdings, Inc.– Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[6],[13] | 3,677 |  |  |
Investment, Identifier [Axis]: Educators Resource, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 17,638 | [5],[9] | 19,252 | [2],[3]
Investment, Identifier [Axis]: Educators Resource, Inc. – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 20,000 | [5] | 20,000 | [3]
Investment, Identifier [Axis]: Funko Acquisition Holdings, LLC – Common Units |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 31 | [6],[9],[14] | 74 | [2],[4],[15],[16]
Investment, Identifier [Axis]: Galaxy Technologies Holdings, Inc. – Common Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 0 | [5],[9] | 0 | [2],[3]
Investment, Identifier [Axis]: Galaxy Technologies Holdings, Inc. – Term Debt 1 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 5,610 | [5] | 6,500 | [3]
Investment, Identifier [Axis]: Galaxy Technologies Holdings, Inc. – Term Debt 2 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 15,281 | [5] | 18,796 | [3]
Investment, Identifier [Axis]: Ginsey Home Solutions, Inc. – Common Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 0 | [5],[9] | 0 | [2],[3]
Investment, Identifier [Axis]: Ginsey Home Solutions, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 0 | [5],[9] | 3,263 | [2],[3]
Investment, Identifier [Axis]: Ginsey Home Solutions, Inc. – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 12,200 | [5] | 13,300 | [4],[17]
Investment, Identifier [Axis]: Gladstone SOG Investments, Inc. - Common Stock( |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[9] | 713 |  |  |
Investment, Identifier [Axis]: Horizon Facilities Services, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 13,188 | [5],[9] | 17,807 | [2],[3]
Investment, Identifier [Axis]: Horizon Facilities Services, Inc. – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 57,700 | [5] | 27,700 | [3]
Investment, Identifier [Axis]: ImageWorks Display and Marketing Group, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 13,131 | [5],[9] | 16,405 | [2],[3],[7]
Investment, Identifier [Axis]: ImageWorks Display and Marketing Group, Inc. – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 22,000 | [5] | 22,000 | [3],[7]
Investment, Identifier [Axis]: J.R. Hobbs Co. - Atlanta, LLC - Guaranty |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [7],[10] |  |  | 0 |
Investment, Identifier [Axis]: J.R. Hobbs Co. - Atlanta, LLC - Term Debt 1 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 10,556 | [5],[13] | 15,023 | [3],[7],[18]
Investment, Identifier [Axis]: J.R. Hobbs Co. - Atlanta, LLC - Term Debt 2 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [3],[7],[18] |  |  | 23,672 |
Investment, Identifier [Axis]: J.R. Hobbs Co. - Atlanta, LLC - Term Debt 3 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [3],[7],[18] |  |  | 2,219 |
Investment, Identifier [Axis]: J.R. Hobbs Co. - Atlanta, LLC – Line of Credit |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[13] | 3,199 |  |  |
Investment, Identifier [Axis]: J.R. Hobbs Co. - Atlanta, LLC – Term Debt 2 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[13] | 16,634 |  |  |
Investment, Identifier [Axis]: J.R. Hobbs Co. - Atlanta, LLC – Term Debt 3 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[13] | 1,560 |  |  |
Investment, Identifier [Axis]: J.R. Hobbs Co. – Atlanta, LLC – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 0 | [5],[9] | 0 | [2],[3],[7]
Investment, Identifier [Axis]: Mason West, LLC – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 10,896 | [5],[9] | 7,553 | [2],[3]
Investment, Identifier [Axis]: Mason West, LLC – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 25,250 | [5] | 25,250 | [3]
Investment, Identifier [Axis]: Nocturne Villa Rentals, Inc. – Line of Credit |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 2,000 | [5] | 0 | [3]
Investment, Identifier [Axis]: Nocturne Villa Rentals, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 14,858 | [5],[9] | 10,223 | [2],[3]
Investment, Identifier [Axis]: Nocturne Villa Rentals, Inc. – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 42,450 | [5] | 27,700 | [3]
Investment, Identifier [Axis]: Nth Degree Investment Group, LLC – Common Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 12,036 | [5],[9] | 511 | [2],[3]
Investment, Identifier [Axis]: Old World Christmas, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 35,028 | [5],[9] | 37,842 | [2],[3],[7]
Investment, Identifier [Axis]: Old World Christmas, Inc. – Secured First Lien Term Loan |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 40,500 | [5] | 25,000 | [3],[7]
Investment, Identifier [Axis]: PSI Molded Plastics, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [2],[3],[7] |  |  | 0 |
Investment, Identifier [Axis]: PSI Molded Plastics, Inc. – Preferred Stock( |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[9] | 0 |  |  |
Investment, Identifier [Axis]: PSI Molded Plastics, Inc. – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 26,618 | [5] | 26,618 | [3]
Investment, Identifier [Axis]: Phoenix Door Systems, Inc – Line of Credit |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [12] | 2,423 |  |  |
Investment, Identifier [Axis]: Phoenix Door Systems, Inc – Line of Credit, |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [11] |  |  | 1,920 |
Investment, Identifier [Axis]: Phoenix Door Systems, Inc. – Common Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 0 | [5],[9] | 0 | [2],[3]
Investment, Identifier [Axis]: Phoenix Door Systems, Inc. – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 3,040 | [12] | 3,072 | [11]
Investment, Identifier [Axis]: SFEG Holdings, Inc. – Common Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 0 | [5],[9] | 0 | [2],[3],[16]
Investment, Identifier [Axis]: SFEG Holdings, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 2,465 | [5],[9] | 0 | [2],[3]
Investment, Identifier [Axis]: SFEG Holdings, Inc. – Term Debt 1 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 3,128 | [5] | 2,909 | [11],[18]
Investment, Identifier [Axis]: SFEG Holdings, Inc. – Term Debt 2 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 12,516 | [5] | 10,914 | [11],[18]
Investment, Identifier [Axis]: Schylling, Inc. – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 19,452 | [5],[9] | 17,820 | [2],[3]
Investment, Identifier [Axis]: Schylling, Inc. – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 27,981 | [5] | 27,981 | [3]
Investment, Identifier [Axis]: The Maids International, LLC – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 0 | [5],[9] | 2,679 | [2],[3],[7]
Investment, Identifier [Axis]: The Maids International, LLC – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [3],[7] |  |  | 28,560 |
Investment, Identifier [Axis]: The Maids International, LLC – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5] | 28,560 |  |  |
Investment, Identifier [Axis]: The Mountain Corporation 1 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [3],[7],[18] |  |  | 3,400 |
Investment, Identifier [Axis]: The Mountain Corporation 2 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [3],[7],[18] |  |  | 800 |
Investment, Identifier [Axis]: The Mountain Corporation – Common Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 0 | [5],[9] | 0 | [2],[3]
Investment, Identifier [Axis]: The Mountain Corporation – Delayed Draw Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [3],[7],[18] |  |  | 118 |
Investment, Identifier [Axis]: The Mountain Corporation – Line of Credit 1 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[13] | 2,411 |  |  |
Investment, Identifier [Axis]: The Mountain Corporation – Line of Credit 2 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[13] | 0 |  |  |
Investment, Identifier [Axis]: The Mountain Corporation – Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [2],[3] |  |  | 0 |
Investment, Identifier [Axis]: The Mountain Corporation – Preferred Stock( |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[9] | 0 |  |  |
Investment, Identifier [Axis]: The Mountain Corporation – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [3],[7],[18] |  |  | 923 |
Investment, Identifier [Axis]: The Mountain Corporation – Term Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5],[13] | 0 |  |  |
Investment, Identifier [Axis]: Utah Pacific Bridge & Steel, Ltd. - Preferred Stock |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 4,794 | [5],[9] | 6,000 | [2],[3],[7]
Investment, Identifier [Axis]: Utah Pacific Bridge & Steel, Ltd., 2 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [3],[7] |  |  | 18,250 |
Investment, Identifier [Axis]: Utah Pacific Bridge & Steel, Ltd., 1 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [3],[7] |  |  | 0 |
Investment, Identifier [Axis]: Utah Pacific Bridge & Steel, Ltd., 2 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value | [5] | 18,250 |  |  |
Significant Unobservable Inputs (Level 3) |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 760,432 |  | 714,322 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Secured First Lien Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 442,028 |  | 411,023 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Secured Second Lien Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 63,153 |  | 39,637 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Preferred Equity |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 221,774 |  | 217,599 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Common Equity/ Equivalents |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | $ 14,998 |  | $ 3,678 |
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 |  | 3.1 |  | 3.4 |
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 |  | 7.9 |  | 9.3 |
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 |  | 7.0 |
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 |  | 5.6 |  | 5.6 |
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 |  | 7.8 |  | 6.8 |
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 |  | 6.7 |  | 6.0 |
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 |  | 3.1 |  | 3.4 |
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 |  | 7.9 |  | 9.3 |
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 |  | 5.9 |  | 6.8 |
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 |  | 4.3 |  | 4.8 |
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 |  | 7.8 |  | 8.4 |
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 |  | 7.2 |  | 5.8 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured First Lien Debt | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | $ 3,973 |  | $ 3,990 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured First Lien Debt | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 18,548 |  | 13,707 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured First Lien Debt | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 10,962 |  | 8,221 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured Second Lien Debt | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
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Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured Second Lien Debt | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
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Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Secured Second Lien Debt | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 5,113 |  | 4,959 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Preferred Equity | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
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Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Preferred Equity | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 18,548 |  | 13,707 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Preferred Equity | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 9,640 |  | 6,926 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Common Equity/ Equivalents | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 969 |  | 829 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Common Equity/ Equivalents | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 27,118 |  | 13,707 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | EBITDA | Common Equity/ Equivalents | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | $ 5,302 |  | $ 5,709 |
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 |  | 0.7 |
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 |  | 0.7 |
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 |  | 0.3 |  | 0.7 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Secured Second Lien Debt | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair value, measurement input |  | 0.5 |  | 0.7 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Secured Second Lien Debt | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair value, measurement input |  | 0.5 |  | 0.7 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Secured Second Lien Debt | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair value, measurement input |  | 0.5 |  | 0.7 |
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 |  | 0.7 |
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 |  | 0.7 |
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 |  | 0.7 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Common Equity/ Equivalents | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair value, measurement input |  | 0.5 |  | 0.7 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Common Equity/ Equivalents | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair value, measurement input |  | 0.5 |  | 0.7 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue multiple | Common Equity/ Equivalents | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair value, measurement input |  | 0.5 |  | 0.7 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Secured First Lien Debt | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | $ 12,461 |  | $ 14,072 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Secured First Lien Debt | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 107,907 |  | 14,072 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Secured First Lien Debt | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 88,029 |  | 14,072 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Secured Second Lien Debt | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 12,461 |  | 14,072 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Secured Second Lien Debt | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 12,461 |  | 14,072 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Secured Second Lien Debt | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair Value |  | 12,461 |  | 14,072 |
Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Preferred Equity | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
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Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Preferred Equity | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
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Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Preferred Equity | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
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Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Common Equity/ Equivalents | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
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Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Common Equity/ Equivalents | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
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Significant Unobservable Inputs (Level 3) | Total Enterprise Value | Revenue | Common Equity/ Equivalents | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
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Significant Unobservable Inputs (Level 3) | Yield Analysis | Secured First Lien Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
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Significant Unobservable Inputs (Level 3) | Yield Analysis | Secured Second Lien Debt |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
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Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured First Lien Debt | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair value, measurement input |  | 0.151 |  | 0.113 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured First Lien Debt | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair value, measurement input |  | 0.189 |  | 0.152 |
Significant Unobservable Inputs (Level 3) | Yield Analysis | Discount Rate | Secured First Lien Debt | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Fair value, measurement input |  | 0.172 |  | 0.146 |
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 |  | 0.133 |  | 0.100 |
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 |  | 0.133 |  | 0.122 |
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 |  | 0.133 |  | 0.116 |
[1] | Cumulative gross unrealized appreciation for federal income tax purposes is $140.8 million; cumulative gross unrealized depreciation for federal income tax purposes is $97.1 million. Cumulative net unrealized appreciation is $43.8 million, based on a tax cost of $670.6 million.
[2] | .
[3] | Fair value was based on the total enterprise value of the portfolio company, which is generally allocated to the portfolio company’s securities in order of their relative priority in the capital structure. Refer to Note 3—Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[4] | One of our affiliated funds, Gladstone Capital Corporation, co-invested with us in this portfolio company pursuant to an exemptive order granted by the U.S. Securities and Exchange Commission.
[5] | Fair value was based on the total enterprise value of the portfolio company, which is generally allocated to the portfolio company’s securities in order of their relative priority in the capital structure. Refer to Note 3—Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[6] | One of our affiliated funds, Gladstone Capital Corporation, co-invested with us in this portfolio company pursuant to an exemptive order granted by the U.S. Securities and Exchange Commission.
[7] | Affiliate investments, as defined by the 1940 Act, are those that are not Control investments and in which we own, with the power to vote, between and inclusive of 5.0% and 25.0% of the issued and outstanding voting securities.
[8] | Affiliate investments, as defined by the 1940 Act, are those that are not Control investments and in which we own, with the power to vote, between and inclusive of 5.0% and 25.0% of the issued and outstanding voting securities.
[9] | non-income producing.
[10] | Refer to Note 10—Commitments and Contingencies in the accompanying Notes to Consolidated Financial Statements for additional information regarding this guaranty.
[11] | Fair value was based on internal yield analysis or on estimates of value submitted by ICE Data Pricing and Reference Data, LLC. Refer to Note 3—Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[12] | Fair value was based on internal yield analysis or on estimates of value submitted by ICE Data Pricing and Reference Data, LLC. Refer to Note 3—Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[13] | Debt security is on non-accrual status.
[14] | Our investment in Funko was valued using Level 2 inputs within the ASC 820 fair value hierarchy. Our common units in Funko are convertible into class A common stock in Funko, Inc. upon meeting certain requirements. Fair value was based on the closing market price of shares of Funko, Inc. as of the reporting date, less a discount for lack of marketability. Funko, Inc. is traded on the Nasdaq Global Select Market under the trading symbol “FNKO.” Refer to Note 3—Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[15] | Our investment in Funko was valued using Level 2 inputs within the ASC 820 fair value hierarchy. Our common units in Funko are convertible into class A common stock in Funko, Inc. upon meeting certain requirements. Fair value was based on the closing market price of shares of Funko, Inc. as of the reporting date, less a discount for lack of marketability. Funko, Inc. is traded on the Nasdaq Global Select Market under the trading symbol “FNKO.” Refer to Note 3—Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[16] | Non-Control/Non-Affiliate investments, as defined by the 1940 Act, are those that are neither Control nor Affiliate investments and in which we own less than 5.0% of the issued and outstanding voting securities.
[17] | $5.1 million of the debt security was participated to a third-party, but is accounted for as collateral for a secured borrowing under accounting principles generally accepted in the U.S. and presented as Secured borrowing on our accompanying Consolidated Statements of Assets and Liabilities as of March 31, 2022.
[18] | Debt security is on non-accrual status.

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