Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
Jul. 31, 2022
Apr. 30, 2022
Inventory Disclosure [Abstract]    
Raw materials $ 2,396,265 $ 2,831,713
Work-in-process 524,811 173,112
Finished goods 1,663,760 891,045
Total $ 4,584,836 $ 3,895,870