Revenue from Contracts with Customers (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contracts with Customers [Abstract]
Underwriter payment receiving period	90 days
Total Revenues by Type [Abstract]
Total revenues	$ 9,043,111	$ 8,303,114
Brokerage Commissions [Member]
Total Revenues by Type [Abstract]
Total revenues	6,376,075	6,154,567
Commissions [Member]
Total Revenues by Type [Abstract]
Total revenues	5,903,200	5,349,348
Hard Dollar Payments [Member]
Total Revenues by Type [Abstract]
Total revenues	472,875	805,219
Research Services [Member]
Total Revenues by Type [Abstract]
Total revenues	1,502,500	2,030,000
Underwriting Fees [Member]
Total Revenues by Type [Abstract]
Total revenues	431,114	102,931
Sales Manager Fees [Member]
Total Revenues by Type [Abstract]
Total revenues	$ 733,422	$ 15,616