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Inventories (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Inventories [Abstract]    
Raw materials $ 1,422,821 $ 1,675,383
Work in progress 1,089,938 2,737,415
Finished goods 8,366,042 5,209,563
Inventories $ 10,878,801 $ 9,622,361