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Revenue from Contracts with Customers (Tables)
12 Months Ended
Dec. 31, 2020
Revenue from Contracts with Customers [Abstract]  
Total Revenues by Type
Total revenues from contracts with customers by type were as follows for the years ended December 31, 2020 and 2019:

  
2020
  
2019
 
Commissions
 
$
3,586,066
  
$
5,903,200
 
Hard dollar payments
  
364,932
   
472,875
 
   
3,950,998
   
6,376,075
 
Research services
  
-
   
1,502,500
 
Underwriting fees
  
70,488
   
431,114
 
Sales manager fees
  
334,825
   
733,422
 
  
$
4,356,311
  
$
9,043,111