Revenue from Contracts with Customers (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contracts with Customers [Abstract]
Underwriter payment receiving period	90 days
Total Revenues by Type [Abstract]
Total revenues	$ 4,356,311	$ 9,043,111
Brokerage Commissions [Member]
Total Revenues by Type [Abstract]
Total revenues	3,950,998	6,376,075
Commissions [Member]
Total Revenues by Type [Abstract]
Total revenues	3,586,066	5,903,200
Hard Dollar Payments [Member]
Total Revenues by Type [Abstract]
Total revenues	364,932	472,875
Research Services [Member]
Total Revenues by Type [Abstract]
Total revenues	0	1,502,500
Underwriting Fees [Member]
Total Revenues by Type [Abstract]
Total revenues	70,488	431,114
Sales Manager Fees [Member]
Total Revenues by Type [Abstract]
Total revenues	$ 334,825	$ 733,422