Revenue from Contracts with Customers (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue from Contracts with Customers [Abstract]
Underwriter payment receiving period			90 days
Total Revenues by Type [Abstract]
Total revenues	$ 1,100,225	$ 2,095,814	$ 2,504,481	$ 4,008,559
Brokerage Commissions [Member]
Total Revenues by Type [Abstract]
Total revenues	1,100,225	1,504,066	2,139,168	3,039,311
Commissions [Member]
Total Revenues by Type [Abstract]
Total revenues	999,541	1,415,928	1,936,325	2,842,163
Hard Dollar Payments [Member]
Total Revenues by Type [Abstract]
Total revenues	100,684	88,138	202,843	197,148
Research Services [Member]
Total Revenues by Type [Abstract]
Total revenues	0	375,000	0	752,500
Underwriting Fees [Member]
Total Revenues by Type [Abstract]
Total revenues	0	94,177	30,488	94,177
Sales Manager Fees [Member]
Total Revenues by Type [Abstract]
Total revenues	$ 0	$ 122,571	$ 334,825	$ 122,571