Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value Hierarchy for Assets and Liabilities Measured at Fair Value

The following tables present the Company's fair value hierarchy for those assets and liabilities measured at fair value on a recurring basis as of the periods presented.

	As of September 30, 2021
	Level 1		Level 2		Level 3		Total
Assets
Securities owned, at fair value
U.S. government securities*	$	2,990,000	$	—	$	—	$	2,990,000
Certificates of deposit		—		92,000		—		92,000
Corporate bonds		—		38,000		—		38,000
Equity securities		648,000		248,000		—		896,000
Total Securities owned, at fair value	$	3,638,000	$	378,000	$	—	$	4,016,000
Liabilities
Securities sold, not yet purchased, at fair value
Equity securities	$	—	$	27,000	$	—	$	27,000
Total Securities sold, not yet purchased, at fair value	$	—	$	27,000	$	—	$	27,000

	As of December 31, 2020
	Level 1		Level 2		Level 3		Total
Assets
Securities owned, at fair value
U.S. government securities*	$	2,029,000	$	—	$	—	$	2,029,000
Certificates of deposit		—		91,000		—		91,000
Corporate bonds		—		24,000		—		24,000
Equity securities		345,000		134,000		—		479,000
Total Securities owned, at fair value	$	2,374,000	$	249,000	$	—	$	2,623,000
Liabilities
Securities sold, not yet purchased, at fair value
Equity securities	$	—	$	21,000	$	—	$	21,000
Total Securities sold, not yet purchased, at fair value	$	—	$	21,000	$	—	$	21,000

*As of September 30, 2021 and December 31, 2020, the U.S. government securities had maturity dates of August 15, 2024 and August 31, 2021, respectively.