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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 |  |

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