Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value	$ 13,652,000	$ 19,862,000
Total Securities sold, not yet purchased, at fair value	75,000	219,000
Equity securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value	75,000	150,000
Corporate bonds [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value		1,000
Options [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value		68,000
U.S. Government Securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Cash and securities segregated for regulatory purposes	37,927,000	34,601,000
Securities owned, at fair value	11,565,000	16,654,000
Certificates of deposit [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value	112,000	113,000
Corporate bonds [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value	1,000
Equity securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value	1,974,000	3,095,000
Level 1 [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value	13,456,000	19,655,000
Total Securities sold, not yet purchased, at fair value	75,000	218,000
Level 1 [Member] \| Equity securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value	75,000	150,000
Level 1 [Member] \| Corporate bonds [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value
Level 1 [Member] \| Options [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value		68,000
Level 1 [Member] \| U.S. Government Securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Cash and securities segregated for regulatory purposes	37,927,000	34,601,000
Securities owned, at fair value	11,565,000	16,654,000
Level 1 [Member] \| Certificates of deposit [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value
Level 1 [Member] \| Corporate bonds [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value
Level 1 [Member] \| Equity securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value	1,891,000	3,001,000
Level 2 [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value	196,000	207,000
Total Securities sold, not yet purchased, at fair value		1,000
Level 2 [Member] \| Equity securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value
Level 2 [Member] \| Corporate bonds [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value		1,000
Level 2 [Member] \| Options [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value
Level 2 [Member] \| U.S. Government Securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Level 2 [Member] \| Certificates of deposit [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value	112,000	113,000
Level 2 [Member] \| Corporate bonds [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value	1,000
Level 2 [Member] \| Equity securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value	83,000	94,000
Level 3 [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value
Total Securities sold, not yet purchased, at fair value
Level 3 [Member] \| Equity securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value
Level 3 [Member] \| Corporate bonds [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value
Level 3 [Member] \| Options [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Total Securities sold, not yet purchased, at fair value
Level 3 [Member] \| U.S. Government Securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Cash and securities segregated for regulatory purposes
Securities owned, at fair value
Level 3 [Member] \| Certificates of deposit [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value
Level 3 [Member] \| Corporate bonds [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value
Level 3 [Member] \| Equity securities [Member]
Schedule of Financial Assets and Liabilities Measured at Fair Value [Line Items]
Securities owned, at fair value