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Property, Plant and Equipment, Net (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Property, Plant and Equipment, Net (Textual)        
Property, plant and equipment, disposals $ 5,317 $ 4,564 $ 21,611 $ 6,394
Depreciation expense $ 568,259 $ 564,522 $ 1,123,382 $ 1,128,327