Revenue Recognition (Details) - Schedule of Principal Transactions and Proprietary Trading - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Schedule of Principal Transactions and Proprietary Trading [Abstract]
Realized and unrealized gain on primarily riskless principal transactions	$ 3,865,000	$ 2,657,000	$ 10,788,000	$ 6,642,000
Realized and unrealized gain on primarily riskless principal transactions Increase (Decrease)	1,208,000		4,146,000
Realized and unrealized gain on portfolio of U.S. government securities	332,000	1,096,000	489,000	2,565,000
Realized and unrealized gain on portfolio of U.S. government securities Increase (Decrease)	(764,000)		(2,076,000)
Total Principal transactions and proprietary trading	4,197,000	$ 3,753,000	11,277,000	$ 9,207,000
Total Principal transactions and proprietary trading Increase (Decrease)	$ 444,000		$ 2,070,000