Related Party Transactions - Schedule of Amounts Due to or Due From the Company to Related Party Affiliates (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Receivable	$ 116	$ 2,660
Payable	(9,429)	(9,966)
Other Affiliated Entities
Related Party Transaction [Line Items]
Receivable		326
Payable		(20)
Affiliated Entity
Related Party Transaction [Line Items]
Receivable	116	2,660
Payable	(9,429)	(9,966)
Affiliated Entity | Horizon Common Inc.
Related Party Transaction [Line Items]
Receivable		17
Payable	(6,949)	(6,899)
Affiliated Entity | Kinetics Common Inc.
Related Party Transaction [Line Items]
Receivable		66
Affiliated Entity | Kinetics Holding Corporation
Related Party Transaction [Line Items]
Receivable		42
Affiliated Entity | Proprietary Funds
Related Party Transaction [Line Items]
Receivable	116	120
Payable		(7)
Affiliated Entity | FRMO Corporation
Related Party Transaction [Line Items]
Payable	$ (2,480)	(3,040)
Affiliated Entity | HM Tech
Related Party Transaction [Line Items]
Receivable		$ 2,089