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INVESTMENTS (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Net change in unrealized appreciation (depreciation) on private investments | $ 1,932 | $ 0 | $ 1,932 | $ 0 |
Cost | 17,104 |  | 17,104 |  | $ 25,232
Gross Unrealized Gains |  | 824 | 917 |  |
Debt Securities, Trading, Unrealized Loss |  | (308) | (315) |  |
Investments in trading securities | 17,706 |  | 17,706 |  | 25,748
Cost | 18,132 |  | 18,132 |  | 26,788
Gross Unrealized Gains |  | 1,226 | 1,942 |  |
Debt Securities, Trading, and Equity Securities, Unrealized Loss |  | (320) | (345) |  |
Estimated Fair Value | 19,729 |  | 19,729 |  | 27,694
Equity Method Investments | 4,263 | 4,211 | 4,263 | $ 4,211 | 4,250
Investment Owned, at Fair Value | 19,729 |  | 19,729 |  | 27,694
Investments under fair value measurement alternative | 14,697 |  | 14,697 |  | 10,747
Total investments | 38,689 |  | 38,689 |  | 42,691
InvestCloud private investment | 4,455 |  | 4,455 |  | 4,455
Investment carrying value - Vista | 2,792 |  | 2,792 |  | 2,792
WEBs - preferred stock | 2,799 |  | 2,799 |  | 1,799
WEBs - call option | 201 |  | 201 |  | 201
TXSE - private investment | 3,450 |  | 3,450 |  | 1,500
Investment carrying value - Ridgeline | 1,000 |  | 1,000 |  |
Total investments under measurement alternative | $ 14,697 |  | $ 14,697 |  | $ 10,747
Zarvona Energy Fund GP , L.P . |  |  |  |  |
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  | 50.00% |  | 50.00%
Equity Method Investments | $ 3,513 |  | $ 3,513 |  | $ 3,524
Zarvona Energy Fund II-A, L.P . |  |  |  |  |
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 0.50% |  | 0.50% |  | 0.50%
Equity Method Investments | $ 731 |  | $ 731 |  | $ 707
Salient MLP Total Return Fund, L.P. [Domain] |  |  |  |  |
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 0.00% |  | 0.00% |  | 0.00%
Equity Method Investments | $ 11 |  | $ 11 |  | $ 11
Salient MLP Total Return TE Fund, L.P. |  |  |  |  |
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 0.20% |  | 0.20% |  | 0.20%
Equity Method Investments | $ 8 |  | $ 8 |  | $ 8
Total |  |  |  |  |
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Equity Method Investments | 4,263 |  | 4,263 |  | 4,250
U.S. Government securities |  |  |  |  |
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Cost | 7,240 |  | 7,240 |  | 15,859
Gross Unrealized Gains |  | 263 | 284 |  |
Debt Securities, Trading, Unrealized Loss |  | (66) | (80) |  |
Investments in trading securities | 7,444 |  | 7,444 |  | 16,056
Money market funds |  |  |  |  |
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Cost | 8,800 |  | 8,800 |  | 7,629
Gross Unrealized Gains |  | 174 | 174 |  |
Debt Securities, Trading, Unrealized Loss |  | 0 | 0 |  |
Investments in trading securities | 8,974 |  | 8,974 |  | 7,803
Equity funds |  |  |  |  |
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Cost | 595 |  | 595 |  | 1,432
Gross Unrealized Gains |  | 318 | 355 |  |
Debt Securities, Trading, Unrealized Loss |  | (132) | (127) |  |
Investments in trading securities | 823 |  | 823 |  | 1,618
Equity Securities |  |  |  |  |
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Cost | 321 |  | 321 |  | 183
Gross Unrealized Gains |  | 69 | 102 |  |
Debt Securities, Trading, Unrealized Loss |  | (108) | (108) |  |
Investments in trading securities | 315 |  | 315 |  | 144
us-gaap_EquitySecuritiesMember [Member] |  |  |  |  |
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Cost | 148 |  | 148 |  | 129
Gross Unrealized Gains |  | 0 | 2 |  |
Debt Securities, Trading, Unrealized Loss |  | (2) | 0 |  |
Investments in trading securities | 150 |  | 150 |  | 127
Private investment funds |  |  |  |  |
Equity Securities, FV-NI, Gain (Loss) [Abstract] |  |  |  |  |
Cost | 1,028 |  | 1,028 |  | 1,556
Gross Unrealized Gains |  | 402 | 1,025 |  |
Equity Securities, FV-NI, Unrealized Loss |  | $ (12) | (30) |  |
Estimated Fair Value | $ 2,023 |  | $ 2,023 |  | $ 1,946

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