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Inventories (Details) - Schedule of inventories - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Schedule of inventories [Abstract]    
Raw materials $ 1,042,448 $ 757,857
Work in progress 1,911,177 2,338,342
Finished goods 3,545,688 2,156,646
Inventories $ 6,499,313 $ 5,252,845