Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
Jan. 31, 2022
Apr. 30, 2021
Inventory Disclosure [Abstract]    
Raw materials $ 1,370,380
Work-in-process 39,153
Finished goods 930,147 362,072
Total $ 2,339,680 $ 362,072