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Property and Equipment, Net (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Property and Equipment, Net (Textual)        
Depreciation expense $ 88,820 $ 106,148 $ 177,435 $ 206,138