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Property and Equipment, Net (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property and Equipment, Net (Textual)      
Depreciation and amortization expense $ 643,265 $ 313,554 $ 134,350
Amortization expense $ 370,807 $ 186,974 $ 48,746