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RELATED PARTY TRANSACTIONS - Narrative part 2 (Details) $ in Thousands |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 13, 2024 USD ($) | Feb. 05, 2024 USD ($) | Aug. 21, 2023 USD ($) | Mar. 10, 2023 USD ($) party | Mar. 02, 2021 USD ($) member | Dec. 31, 2024 USD ($) director | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Feb. 07, 2025 USD ($) | Dec. 31, 2023 USD ($) | Nov. 21, 2023 USD ($) | Nov. 02, 2023 USD ($) member | Jun. 30, 2023 member
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  | $ 151,704 |  | $ 151,704 |  |  | $ 532,419 |  |  |
Interest income |  |  |  |  |  |  | 1,438 | $ 180 | 2,909 | $ 3,455 |  |  |  |  |
Freedom VCM Holdings, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, fair value adjustment |  |  |  |  |  |  | (54,333) |  | (222,718) |  |  |  |  |  |
Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income, operating |  |  |  |  |  |  | 1,538 | 1,173 | 5,930 | 1,173 |  |  |  |  |
Underwriting and financial advisory and other fees |  |  |  |  |  |  | $ 601 | 2,439 | $ 1,325 | 3,253 |  |  |  |  |
Related Party | BRC Partners Opportunity Fund, LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership, percentage |  |  |  |  |  |  | 58.20% |  | 58.20% |  |  |  |  |  |
Related Party | BRC Partners Opportunity Fund, LP | Co-Chief Executive Officer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership, percentage |  |  |  |  |  |  |  |  |  |  |  | 24.90% |  |  |
Related Party | 272 Capital L.P |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership, percentage |  |  |  |  |  |  |  |  |  |  |  | 15.30% |  |  |
Torticity, LLC | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  | $ 17,986 |  | $ 17,986 |  |  | $ 6,791 |  | $ 15,369 |
Loans receivable, fair value disclosure, drawn |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,690 |
Loans receivable, fair value disclosure, remaining |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,679 |
Loans receivable, basis spread on variable rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 15.00% |
Interest income, operating |  |  |  |  |  |  | 1,281 |  | 3,746 |  |  |  |  |  |
Number of senior management members | member |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |
Kanaci Technologies, LLC | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  | 11,453 |  | 11,453 |  |  | 3,904 | $ 10,000 |  |
Loans receivable, fair value disclosure, drawn |  |  |  |  |  |  |  |  |  |  |  |  | 4,000 |  |
Loans receivable, fair value disclosure, remaining |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,000 |  |
Loans receivable, basis spread on variable rate |  |  |  |  |  |  |  |  |  |  |  |  | 15.00% |  |
Interest income, operating |  |  |  |  |  |  | 1,244 |  | 2,088 |  |  |  |  |  |
Number of senior management members appointed | member |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1
Dash Medical Holdings, LLC | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of senior management members appointed | member |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |
Purchase of equity investments |  |  |  |  | $ 2,400 |  |  |  |  |  |  |  |  |  |
Equity investments | $ 2,760 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, realized gain (loss) on disposal | $ 360 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan Receivable Sold | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing receivable sold |  |  |  | $ 7,600 |  |  |  |  |  |  |  |  |  |  |
Number of related parties | party |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
Q-mation, Inc. | Related Party | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advisory fee earned |  |  |  |  |  | $ 2,650 |  |  |  |  |  |  |  |  |
Number of board directors | director |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |
272LP And 272 Advisors, LLC | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing receivable, sale, promissory note |  | $ 2,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Financing receivable, sale, aggregate revenue share amount |  | $ 4,100 |  |  |  |  |  |  |  |  |  |  |  |  |
Freedom VCM Holdings, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  | 3,141 |  | 3,141 |  |  | 20,624 |  |  |
Interest rate |  |  | 12.00% |  |  |  |  |  |  |  |  |  |  |  |
Dividends paid, equal to the greater of net after-tax proceeds, percentage |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |
Dividends paid, equal to the greater of gross proceeds, percentage |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |
Take-private transaction, price |  |  | $ 227,296 |  |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  | 3,409 | $ 2,740 | 15,573 | $ 2,740 |  |  |  |  |
Equity method investments, fair value disclosure |  |  |  |  |  |  | 0 |  | 0 |  |  | $ 232,065 |  |  |
Purchase of equity investments |  |  | 216,500 |  |  |  |  |  |  |  |  |  |  |  |
Freedom VCM Holdings, LLC | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  | $ 2,154 |  |  |  |
Freedom VCM Holdings, LLC | First Priority Security Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  | $ 200,506 |  |  |  | $ 2,250 |  | $ 2,250 |  |  |  |  |  |
BRC Partners Opportunity Fund, LP | Loan Receivable Sold | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing receivable sold |  |  |  | $ 3,519 |  |  |  |  |  |  |  |  |  |  |
272 Capital L.P | Loan Receivable Sold | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing receivable sold |  |  |  | $ 4,081 |  |  |  |  |  |  |  |  |  |  |

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