Revenue Recognition (Details) - Schedule of represents the loss related to principal transactions - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Principal transactions and proprietary trading
Realized and unrealized gain on primarily riskless principal transactions	$ 2,657,000	$ 2,340,000	$ 6,642,000	$ 5,956,000
Realized and unrealized gain on primarily riskless principal transactions	317,000		686,000
Unrealized gain (loss) on portfolio of U.S. government securities	1,096,000	(1,387,000)	2,565,000	(4,189,000)
Unrealized gain (loss) on portfolio of U.S. government securities	2,483,000		6,754,000
Total Principal transactions and proprietary trading	3,753,000	$ 953,000	9,207,000	$ 1,767,000
Total Principal transactions and proprietary trading	$ 2,800,000		$ 7,440,000