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DISTRIBUTIONS TO COMMON STOCKHOLDERS - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | [1] | Sep. 30, 2022 | Jun. 30, 2022 | [1] | Sep. 30, 2023 | Sep. 30, 2022 | Mar. 31, 2023
Equity [Abstract] |  |  |  |  |  |  |  |  |
Investment company, cash distributions paid to common stockholders from ordinary income | 72.70% |  |  |  |  |  | 72.70% |  |
Investment company, cash distributions paid to common stockholders from capital gains | 27.30% |  |  |  |  |  | 27.30% |  |
Cash distributions to common stockholders |  |  |  |  |  |  | $ 24,300 | $ 18,900 |
Distributions to common stockholders from ordinary income | $ 6,665 | [1] | $ 7,069 | $ 4,678 | [1] | $ 3,188 |  |  | $ 21,400
Distributions to common stockholders from net realized gains | 5,519 | [1] | $ 5,024 | 2,797 | [1] | $ 8,268 |  |  | $ 10,600
Investment company, net adjustments for tax difference to capital distribution | $ 500 |  |  | $ 400 |  |  | $ 100 | $ 1,300 |
[1] | Refer to Note 8 — Distributions to Common Stockholders in the accompanying Notes to Consolidated Financial Statements for additional information.

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