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Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of other current assets
    DECEMBER 31,  
    2018     2017  
             
Inventories   $ 183,900     $ 157,058  
Prepaid rent, insurance and other assets     902,786       610,886  
                 
Total other current assets   $ 1,086,686     $ 767,944