Annual report pursuant to Section 13 and 15(d)

Inventories, Net - Additional Information (Details)

v3.20.1
Inventories, Net - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Inventories, Net      
Net realizable value on inventory write-down $ 3,153,028    
Additional obsolescence provision 1,419,631    
Inventory Reserve For Obsolescence $ 4,572,659 $ 0 $ 0