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5. INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Inventories
    2020     2019  
Materials   $ 1,238,332     $ 911,054  
Work in process     84,203       10,284  
Finished goods     15,182,305       6,519,012  
Total   $ 16,504,840     $ 7,440,350