Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

v3.21.4
Inventories (Details) - USD ($)
Oct. 31, 2021
Apr. 30, 2021
Inventory Disclosure [Abstract]    
Raw materials $ 1,033,801
Work-in-process 176,522
Finished goods 775,184 362,072
Total $ 1,985,507 $ 362,072