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Fair Value Measurements (Details) - Schedule of Financial Assets and Liabilities Measured at Fair Value - USD ($) | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Assets |  |
Total Securities owned, at fair value | $ 19,270,000 | $ 18,038,000
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value | 1,000 | 2,000
Level 1 [Member] |  |
Assets |  |
Total Securities owned, at fair value | 17,901,000 | 17,784,000
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value |  | 2,000
Level 2 [Member] |  |
Assets |  |
Total Securities owned, at fair value | 1,369,000 | 254,000
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value | 1,000 |
Level 3 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value |  |
Equity securities [Member] |  |
Assets |  |
Total Securities owned, at fair value | 1,153,000 |
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value | 1,000 | 2,000
Equity securities [Member] | Level 1 [Member] |  |
Assets |  |
Total Securities owned, at fair value | 76,000 |
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value |  | 2,000
Equity securities [Member] | Level 2 [Member] |  |
Assets |  |
Total Securities owned, at fair value | 1,077,000 |
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value | 1,000 |
Equity securities [Member] | Level 3 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value |  |
U.S. government securities [Member] |  |
Assets |  |
Cash and securities segregated for regulatory purposes | 100,440,000 | 115,515,000
U.S. government securities [Member] | Level 1 [Member] |  |
Assets |  |
Cash and securities segregated for regulatory purposes | 100,440,000 | 115,515,000
U.S. government securities [Member] | Level 2 [Member] |  |
Assets |  |
Cash and securities segregated for regulatory purposes |  |
U.S. government securities [Member] | Level 3 [Member] |  |
Assets |  |
Cash and securities segregated for regulatory purposes |  |
U.S. government securities [Member] |  |
Assets |  |
Total Securities owned, at fair value | 17,825,000 | 17,636,000
U.S. government securities [Member] | Level 1 [Member] |  |
Assets |  |
Total Securities owned, at fair value | 17,825,000 | 17,636,000
U.S. government securities [Member] | Level 2 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
U.S. government securities [Member] | Level 3 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
Certificates of deposit [Member] |  |
Assets |  |
Total Securities owned, at fair value | 114,000 | 114,000
Certificates of deposit [Member] | Level 1 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
Certificates of deposit [Member] | Level 2 [Member] |  |
Assets |  |
Total Securities owned, at fair value | 114,000 | 114,000
Certificates of deposit [Member] | Level 3 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
Municipal securities [Member] |  |
Assets |  |
Total Securities owned, at fair value | 154,000 |
Municipal securities [Member] | Level 1 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
Municipal securities [Member] | Level 2 [Member] |  |
Assets |  |
Total Securities owned, at fair value | 154,000 |
Municipal securities [Member] | Level 3 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
Corporate bonds [Member] |  |
Assets |  |
Total Securities owned, at fair value | 24,000 | 3,000
Corporate bonds [Member] | Level 1 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
Corporate bonds [Member] | Level 2 [Member] |  |
Assets |  |
Total Securities owned, at fair value | 24,000 | 3,000
Corporate bonds [Member] | Level 3 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
Options [Member] |  |
Assets |  |
Total Securities owned, at fair value |  | 2,000
Options [Member] | Level 1 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  | 2,000
Options [Member] | Level 2 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
Options [Member] | Level 3 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |
Equity securities [Member] |  |
Assets |  |
Total Securities owned, at fair value |  | 283,000
Equity securities [Member] | Level 1 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  | 146,000
Equity securities [Member] | Level 2 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  | 137,000
Equity securities [Member] | Level 3 [Member] |  |
Assets |  |
Total Securities owned, at fair value |  |

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