Fair Value Measurements (Tables)

6 Months Ended

Jun. 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 June 30, 2021
	Level 1		Level 2		Level 3		Total
Assets
Securities owned, at fair value
U.S. government securities*	$	2,015,000	$	—	$	—	$	2,015,000
Certificates of deposit		—		91,000		—		91,000
Corporate bonds		—		15,000		—		15,000
Equity securities		1,098,000		1,056,000		—		2,154,000
Total Securities owned, at fair value	$	3,113,000	$	1,162,000	$	—	$	4,275,000
Liabilities
Securities sold, not yet purchased, at fair value
Equity securities	$	—	$	27,000	$	—	$	27,000
Unit investment trusts		—		22,000		—		22,000
Total Securities sold, not yet purchased, at fair value	$	—	$	49,000	$	—	$	49,000

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	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 June 30, 2021 and December 31, 2020, these U.S. government securities mature on 08/31/21