Receivables from, Payables to, and Deposits with Broker-Dealers and Clearing Organizations (Schedule of Receivable) (Details) - USD ($)		Jun. 30, 2022	Dec. 31, 2021
Receivables from and deposits with broker-dealers and clearing organizations
DTCC / OCC / NSCC	[1]	$ 6,917,000	$ 10,968,000
Goldman Sachs & Co. LLC ("GSCO")		27,000	335,000
Pershing Capital		1,090,000	1,193,000
National Financial Services, LLC (“NFS”)		1,333,000	974,000
Securities fail-to-deliver		78,000	174,000
Globalshares		45,000	55,000
Other receivables		131,000	27,000
Total Receivables from and deposits with broker-dealers and clearing organizations		9,621,000	13,726,000
Payables to broker-dealers and clearing organizations
Securities fail-to-receive		690,000	254,000
Payables to broker-dealers		165,000
Total Payables to broker-dealers and clearing organizations		$ 855,000	$ 254,000

[1] Depository Trust & Clearing Corporation is referred to as (“DTCC”), Options Clearing Corporation is referred to as (“OCC”), and National Securities Clearing Corporation is referred to as (“NSCC”).