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v3.22.2.2

RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Mar. 31, 2022
Related Party Transaction [Line Items] |  |  |  |  |
Base management fee | 2.00% | 2.00% | 2.00% | 2.00% |
Base management fee, percent fee |  |  | 100.00% |  |
Investment company, excess expense reimbursable | $ 70,000 | $ 132,000 | $ 106,000 | $ 63,000 |
Maximum base management fee paid cannot exceed a percentage of total assets |  |  | 2.00% |  |
Ratio of net investment income (loss) to average net assets – annualized | 7.01% | (0.52%) | 5.69% | (2.91%) |
Incentive fee base on minimum rate of return required on investment | $ 0 |  |  |  |
Percentage of pre-incentive fee net investment income is less than the hurdle rate |  |  | 100.00% |  |
Investment company, pre-incentive fee net investment income, percent threshold of net assets |  |  | 2.1875% |  |
Pre-incentive fee net investment income exceeds the hurdle rate |  |  | 20.00% |  |
Investment company, capital gains-based incentive fees | 20.00% |  | 20.00% |  |
Investment company, capital gains-based incentive fees |  |  | $ 0 |  | $ 5,300,000
Investment company, capital gains-based incentive fees payable | $ (1,700,000) | $ 5,600,000 | (700,000) | $ 15,900,000 |
Success fee income | 1,733,000 | 2,650,000 | 6,733,000 | 4,682,000 |
Due from related parties | 13,000 |  | $ 13,000 |  | $ 27,000
Minimum |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Ratio of net investment income (loss) to average net assets – annualized |  |  | 1.75% |  |
Affiliated Entity |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Success fee income | $ 1,000,000 | $ 300,000 | $ 1,300,000 | $ 400,000 |
Adviser | David Gladstone | Chief Executive Officer |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Noncontrolling interest, ownership percentage by parent | 100.00% |  | 100.00% |  |
Administrator | David Gladstone | Chief Executive Officer |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Noncontrolling interest, ownership percentage by parent | 100.00% |  | 100.00% |  |
Gladstone Securities, LLC | David Gladstone | Chief Executive Officer |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Noncontrolling interest, ownership percentage by parent | 100.00% |  | 100.00% |  |

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