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Selling, General And Administrative (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Selling, General and Administrative Expense [Abstract]    
Compensation and related costs $ 5,981,459 $ 8,180,100
Advertising and marketing 1,596,304 2,948,155
Professional fees 1,667,096 842,703
Technology development and software 403,475 622,144
General and administrative 3,753,010 5,463,324
Total selling general and administrative $ 13,401,344 $ 18,056,426