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Inventories (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Inventories [Abstract]    
Raw materials $ 408,288 $ 482,836
Work in progress 931,717 1,254,490
Finished goods 2,279,527 6,929,388
Inventories $ 3,619,532 $ 8,666,714