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Property and Equipment, Net (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Property and Equipment, Net (Textual)        
Depreciation expense $ 99,990 $ 130,637 $ 447,746 $ 568,028