Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Measurements [Abstract]

Schedule of estimated fair values

The tables below present, by level within the fair value hierarchy, financial assets and liabilities, measured at fair value on a recurring basis for the periods indicated. As required by ASC Topic 820, financial assets and financial liabilities are classified in their entirety based on the lowest level of input that is significant to the respective fair value measurement.

	As of September 30, 2023
	Level 1		Level 2		Level 3		Total
Assets
Cash and securities segregated for regulatory purposes
U.S. government securities	$	118,101,000	$	—	$	—	$	118,101,000
Securities owned, at fair value
U.S. government securities	$	17,875,000	$	—	$	—	$	17,875,000
Certificates of deposit		—		113,000		—		113,000
Municipal securities		—		319,000		—		319,000
Corporate bonds		—		131,000		—		131,000
Equity securities		117,000		132,000		—		249,000
Total Securities owned, at fair value	$	17,992,000	$	695,000	$	—	$	18,687,000
Liabilities
Securities sold, not yet purchased, at fair value
Equity securities	$	1,000	$	—	$	—	$	1,000
Total Securities sold, not yet purchased, at fair value	$	1,000	$	—	$	—	$	1,000

	As of December 31, 2022
	Level 1		Level 2		Level 3		Total
Assets
Cash and securities segregated for regulatory purposes
U.S. government securities	$	140,978,000	$	—	$	—	$	140,978,000
Securities owned, at fair value
U.S. government securities	$	2,808,000	$	—	$	—	$	2,808,000
Certificates of deposit		—		92,000		—		92,000
Municipal securities		—		52,000		—		52,000
Corporate bonds		—		7,000		—		7,000
Equity securities		63,000		182,000		—		245,000
Total Securities owned, at fair value	$	2,871,000	$	333,000	$	—	$	3,204,000
Liabilities
Securities sold, not yet purchased, at fair value
Equity securities	$	2,000	$	—	$	—	$	2,000
Total Securities sold, not yet purchased, at fair value	$	2,000	$	—	$	—	$	2,000

Schedule of U.S. government securities with the below market values and maturity dates

The Company had U.S. government securities with the below market values and maturity dates for the periods indicated:

	As of September 30, 2023
Market value of U.S. government securities portfolio
Maturing in 2023	$	67,245,000
Maturing in 2024		64,505,000
Maturing in 2025		3,918,000
Accrued interest		308,000
Total Market value of U.S. government securities portfolio	$	135,976,000
		As of December 31, 2022
Market value of U.S. government securities portfolio
Maturing in 2023	$	106,873,000
Maturing in 2024		36,506,000
Accrued interest		408,000
Total Market value of U.S. government securities portfolio	$	143,787,000

Schedule of estimated fair values

	As of September 30, 2023		As of December 31, 2022
Equity method investment in related party	$	—	$	2,584,000