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Selling, General And Administrative
 6 Months Ended
Jun. 30, 2018
Selling General And Administrative  
Selling, General And Administrative

The following table summarizes the detail of selling, general and administrative expense for the three-month and six-month periods ended June 30, 2018 and 2017:

    Three-months Ended June 30,     Six-months Ended June 30,  
    2018     2017     2018     2017  
Selling, General and Administrative:                        
Compensation and related costs   $ 1,530,427     $ 801,162     $ 2,930,903     $ 923,092  
Advertising and marketing     2,229,837       242,906       3,352,135       269,036  
Professional fees     236,598       186,188       446,461       532,445  
Technology development     211,489       108,694       494,828       186,702  
General and administrative     1,337,158       370,017       2,201,674       452,899  
    $ 5,545,509     $ 1,708,967     $ 9,426,001     $ 2,364,174