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Inventories
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Inventories

5. Inventories

 

   

March 31,

2021

   

December 31,

2020

 
             
Completed goods   $ 4,337,962     $ 3,393,794  
Work in progress     177,201       152,595  
Raw materials and supplies     5,474,175       4,826,087