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Intangible Assets (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Intangible Assets (Textual)        
Amortization expense relating to intangible assets $ 17,912 $ 33,429 $ 40,534 $ 66,857