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INVESTMENTS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Cost	$ 17,156		$ 25,232
Gross Unrealized Gains	783	$ 824
Debt Securities, Trading, Unrealized Loss	(327)	(308)
Investments in trading securities	17,612		25,748
Cost	18,199		26,788
Gross Unrealized Gains	1,836	1,226
Debt Securities, Trading, and Equity Securities, Unrealized Loss	(339)	(320)
Estimated Fair Value	19,696		27,694
Equity Method Investments	4,208	4,519	4,250
Investment Owned, at Fair Value	19,696		27,694
Investments under fair value measurement alternative	11,747		10,747
Total investments	35,651		42,691
InvestCloud private investment	4,455		4,455
Investment carrying value - Vista	2,792		2,792
WEBs - preferred stock	1,799		1,799
WEBs - call option	201		201
TXSE - private investment	1,500		1,500
Investment carrying value - Ridgeline	1,000
Total investments under measurement alternative	$ 11,747		$ 10,747
Zarvona Energy Fund GP , L.P .
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Equity Method Investment, Ownership Percentage	50.00%		50.00%
Equity Method Investments	$ 3,482		$ 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%
Equity Method Investments	$ 707		$ 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%
Equity Method Investments	$ 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%
Equity Method Investments	$ 8		$ 8
Total
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Equity Method Investments	4,208		4,250
U.S. Government securities
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Cost	8,093		15,859
Gross Unrealized Gains	250	263
Debt Securities, Trading, Unrealized Loss	(56)	(66)
Investments in trading securities	8,287		16,056
Money market funds
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Cost	7,646		7,629
Gross Unrealized Gains	174	174
Debt Securities, Trading, Unrealized Loss	0	0
Investments in trading securities	7,820		7,803
Equity funds
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Cost	935		1,432
Gross Unrealized Gains	291	318
Debt Securities, Trading, Unrealized Loss	(130)	(132)
Investments in trading securities	1,096		1,618
Equity Securities
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Cost	341		183
Gross Unrealized Gains	68	69
Debt Securities, Trading, Unrealized Loss	(139)	(108)
Investments in trading securities	270		144
us-gaap_EquitySecuritiesMember [Member]
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Cost	141		129
Gross Unrealized Gains	0	0
Debt Securities, Trading, Unrealized Loss	(2)	(2)
Investments in trading securities	139		127
Private investment funds
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Cost	1,043		1,556
Gross Unrealized Gains	1,053	402
Equity Securities, FV-NI, Unrealized Loss	(12)	$ (12)
Estimated Fair Value	$ 2,084		$ 1,946

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