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ORGANIZATION, BUSINESS AND BASIS OF PRESENTATION (Details) - USD ($) |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended | 16 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 23, 2023 | Feb. 25, 2022 | Dec. 23, 2020 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022 | Jun. 30, 2023 | May 05, 2022
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Share repurchase program term | 12 months |  |  |  |  | 12 months |  |  |  |
Purchases of shares in repurchase plan |  |  |  | $ 10,854,000 | $ 13,008,000 | $ 10,854,000 | $ 15,113,000 |  |  |
Sierra Merger |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Shares of common stock repurchased (in shares) |  |  |  | 1,400,000 |  | 1,400,000 |  |  |  |
Shares of common stock repurchased, average price (in dollars per share) |  |  |  | $ 7.75 |  | $ 7.75 |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock aggregate amount | $ 30,000,000 | $ 30,000,000 |  |  |  |  |  |  |  |
Common stock market price percent of NAV, threshold |  | 90.00% |  |  |  |  |  |  |  |
Shares of common stock repurchased (in shares) |  |  |  | 1,400,000 | 1,309,442 | 1,400,000 | 1,517,119 |  |  |
Purchases of shares in repurchase plan |  |  |  | $ 1,000 | $ 1,000 | $ 1,000 | $ 1,000 |  |  |
Common Stock | MVC |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock aggregate amount |  |  | $ 15,000,000 |  |  |  |  |  |  |
Common stock market price percent of NAV, threshold |  |  | 90.00% |  |  |  |  |  |  |
Shares of common stock repurchased (in shares) |  |  |  |  |  |  |  |  |  | 207,677
Shares of common stock repurchased, average price (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 10.14
Common Stock | Sierra Acquisition |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock aggregate amount |  | $ 30,000,000 |  |  |  |  |  |  |  |
Common stock market price percent of NAV, threshold |  | 90.00% |  |  |  |  |  |  |  |
Shares of common stock repurchased (in shares) |  |  |  |  |  |  |  |  | 3,179,168 |
Shares of common stock repurchased, average price (in dollars per share) |  |  |  |  |  |  |  |  | $ 9.44 |
Common Stock | Sierra Merger |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Purchases of shares in repurchase plan |  |  |  |  |  |  |  | $ 30,000,000 |  |

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