Annual report pursuant to Section 13 and 15(d)

Property, plant and equipment -Depreciation (Details)

v3.20.1
Property, plant and equipment -Depreciation (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Abstract]    
Depreciation and amortization $ 847,622 $ 1,537,622