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Revenues (Tables)
12 Months Ended
Dec. 31, 2019
Revenue  
Revenue from the Rendering of Services

    

2019

    

2018

    

2017

Service revenue:

 

  

 

  

 

  

Commissions

$

431,781

$

420,160

$

394,397

Fees

 

372,243

 

329,355

 

230,020

 

804,024

 

749,515

 

624,417

Inventory sales revenue

 

514,617

 

420,511

 

346,774

$

1,318,641

$

1,170,026

$

971,191