Fair Value Measurements (Details) - Schedule of Fair Value Hierarchy for Assets and Liabilities Measured at Fair Value - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	$ 3,204,000	$ 3,991,000
Securities sold, not yet purchased, at fair value
Securities sold, not yet purchased, at fair value	2,000	24,000
U.S. government securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	140,978,000	2,966,000
U.S. government securities owned [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	2,808,000
Certificates of deposit [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	92,000	91,000
Municipal securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	52,000
Corporate bonds [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	7,000	12,000
Equity securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	245,000	922,000
Securities sold, not yet purchased, at fair value
Securities sold, not yet purchased, at fair value	2,000	24,000
Fair Value, Inputs, Level 1 [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	2,871,000	3,455,000
Securities sold, not yet purchased, at fair value
Securities sold, not yet purchased, at fair value	2,000
Fair Value, Inputs, Level 1 [Member] | U.S. government securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	140,978,000	2,966,000
Fair Value, Inputs, Level 1 [Member] | U.S. government securities owned [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	2,808,000
Fair Value, Inputs, Level 1 [Member] | Certificates of deposit [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Fair Value, Inputs, Level 1 [Member] | Municipal securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Fair Value, Inputs, Level 1 [Member] | Corporate bonds [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Fair Value, Inputs, Level 1 [Member] | Equity securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	63,000	489,000
Securities sold, not yet purchased, at fair value
Securities sold, not yet purchased, at fair value	2,000
Fair Value, Inputs, Level 2 [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	333,000	536,000
Securities sold, not yet purchased, at fair value
Securities sold, not yet purchased, at fair value		24,000
Fair Value, Inputs, Level 2 [Member] | U.S. government securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Fair Value, Inputs, Level 2 [Member] | U.S. government securities owned [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Fair Value, Inputs, Level 2 [Member] | Certificates of deposit [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	92,000	91,000
Fair Value, Inputs, Level 2 [Member] | Municipal securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	52,000
Fair Value, Inputs, Level 2 [Member] | Corporate bonds [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	7,000	12,000
Fair Value, Inputs, Level 2 [Member] | Equity securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value	182,000	433,000
Securities sold, not yet purchased, at fair value
Securities sold, not yet purchased, at fair value		24,000
Fair Value, Inputs, Level 3 [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Securities sold, not yet purchased, at fair value
Securities sold, not yet purchased, at fair value
Fair Value, Inputs, Level 3 [Member] | U.S. government securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Fair Value, Inputs, Level 3 [Member] | U.S. government securities owned [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Fair Value, Inputs, Level 3 [Member] | Certificates of deposit [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Fair Value, Inputs, Level 3 [Member] | Municipal securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Fair Value, Inputs, Level 3 [Member] | Corporate bonds [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Fair Value, Inputs, Level 3 [Member] | Equity securities [Member]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Securities sold, not yet purchased, at fair value
Securities sold, not yet purchased, at fair value