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SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2023 | Feb. 28, 2023 | Jan. 31, 2023 | Dec. 30, 2022 | Nov. 30, 2022 | Oct. 31, 2022 | Dec. 31, 2021 | Nov. 30, 2021 | Oct. 29, 2021 | Jan. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2022
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of investments |  |  |  |  |  |  |  |  |  |  |  | $ 13,379 | $ 110,794 |
Investment company, committed capital |  |  |  |  |  |  |  |  |  |  |  | $ 67,305 |  | $ 74,846
Common stock dividends paid (in USD per share) |  |  |  | $ 0.07 | $ 0.07 | $ 0.07 | $ 0.065 | $ 0.065 | $ 0.065 |  |  | $ 0.21 | $ 0.195 |
Unused lines of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment company, committed capital |  |  |  |  |  |  |  |  |  |  |  | $ 26,064 |  | $ 36,225
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock dividends paid (in USD per share) | $ 0.075 | $ 0.075 | $ 0.075 |  |  |  |  |  |  |  | $ 0.225 |  |  |
Subsequent Event | Unused lines of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment company, committed capital |  |  |  |  |  |  |  |  |  | $ 4,500 |  |  |  |
Subsequent Event | Investment, Identifier [Axis]: NeoGraf Solutions, LLC | Secured first lien debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of investments |  |  |  |  |  |  |  |  |  | $ 29,000 |  |  |  |

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