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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 |  |

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