Fair Value Measurements (Details) - Schedule of Financial Assets and Liabilities Measured at Fair Value - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Securities owned, at fair value
Total Securities owned, at fair value	$ 18,038,000	$ 3,204,000
Securities sold, not yet purchased, at fair value
Total Securities sold, not yet purchased, at fair value	2,000	2,000
U.S. government securities [Member]
Cash and securities segregated for regulatory purposes
Cash and securities segregated for regulatory purposes	115,515,000	140,978,000
U.S. government securities owned [Member]
Securities owned, at fair value
Total Securities owned, at fair value	17,636,000	2,808,000
Certificates of deposit [Member]
Securities owned, at fair value
Total Securities owned, at fair value	114,000	92,000
Corporate bonds [Member]
Securities owned, at fair value
Total Securities owned, at fair value	3,000	7,000
Options [Member]
Securities owned, at fair value
Total Securities owned, at fair value	2,000
Municipal securities [Member]
Securities owned, at fair value
Total Securities owned, at fair value		52,000
Equity securities [Member]
Securities owned, at fair value
Total Securities owned, at fair value	283,000	245,000
Securities sold, not yet purchased, at fair value
Total Securities sold, not yet purchased, at fair value	2,000	2,000
Level 1 [Member]
Securities owned, at fair value
Total Securities owned, at fair value	17,784,000	2,871,000
Securities sold, not yet purchased, at fair value
Total Securities sold, not yet purchased, at fair value	2,000	2,000
Level 1 [Member] | U.S. government securities [Member]
Cash and securities segregated for regulatory purposes
Cash and securities segregated for regulatory purposes	115,515,000	140,978,000
Level 1 [Member] | U.S. government securities owned [Member]
Securities owned, at fair value
Total Securities owned, at fair value	17,636,000	2,808,000
Level 1 [Member] | Certificates of deposit [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Level 1 [Member] | Corporate bonds [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Level 1 [Member] | Options [Member]
Securities owned, at fair value
Total Securities owned, at fair value	2,000
Level 1 [Member] | Municipal securities [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Level 1 [Member] | Equity securities [Member]
Securities owned, at fair value
Total Securities owned, at fair value	146,000	63,000
Securities sold, not yet purchased, at fair value
Total Securities sold, not yet purchased, at fair value	2,000	2,000
Level 2 [Member]
Securities owned, at fair value
Total Securities owned, at fair value	254,000	333,000
Securities sold, not yet purchased, at fair value
Total Securities sold, not yet purchased, at fair value
Level 2 [Member] | U.S. government securities [Member]
Cash and securities segregated for regulatory purposes
Cash and securities segregated for regulatory purposes
Level 2 [Member] | U.S. government securities owned [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Level 2 [Member] | Certificates of deposit [Member]
Securities owned, at fair value
Total Securities owned, at fair value	114,000	92,000
Level 2 [Member] | Corporate bonds [Member]
Securities owned, at fair value
Total Securities owned, at fair value	3,000	7,000
Level 2 [Member] | Options [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Level 2 [Member] | Municipal securities [Member]
Securities owned, at fair value
Total Securities owned, at fair value		52,000
Level 2 [Member] | Equity securities [Member]
Securities owned, at fair value
Total Securities owned, at fair value	137,000	182,000
Securities sold, not yet purchased, at fair value
Total Securities sold, not yet purchased, at fair value
Level 3 [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Securities sold, not yet purchased, at fair value
Total Securities sold, not yet purchased, at fair value
Level 3 [Member] | U.S. government securities [Member]
Cash and securities segregated for regulatory purposes
Cash and securities segregated for regulatory purposes
Level 3 [Member] | U.S. government securities owned [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Level 3 [Member] | Certificates of deposit [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Level 3 [Member] | Corporate bonds [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Level 3 [Member] | Options [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Level 3 [Member] | Municipal securities [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Level 3 [Member] | Equity securities [Member]
Securities owned, at fair value
Total Securities owned, at fair value
Securities sold, not yet purchased, at fair value
Total Securities sold, not yet purchased, at fair value