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Segments - Summary of Long-lived Assets (Net) Attributable to Operations Geographical Segment (Details) - USD ($)
Jun. 30, 2018
Dec. 31, 2017
Long-lived assets net $ 12,905,519 $ 13,618,655
United States [Member]    
Long-lived assets net 12,890,912 13,613,043
Foreign Countries [Member]    
Long-lived assets net $ 14,607 $ 5,612