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Selling, General And Administrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 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
Total selling general and administrative $ 5,545,509 $ 1,708,967 $ 9,426,001 $ 2,364,174