Annual report pursuant to Section 13 and 15(d)

Inventories (Details)

v3.22.2
Inventories (Details) - USD ($)
Apr. 30, 2022
Apr. 30, 2021
Inventory Disclosure [Abstract]    
Raw materials $ 2,831,713
Work-in-process 173,112
Finished goods 891,045 362,072
Total $ 3,895,870 $ 362,072