Annual report pursuant to Section 13 and 15(d)

Operating leases (Details)

v3.22.2
Operating leases (Details)
12 Months Ended
Apr. 30, 2022
USD ($)
Operating Lease, Expense $ 254,906
Operating Lease Location 1 [Member]  
Operating Lease, Expense 22,000
Operating Lease Location 2 [Member]  
Operating Lease, Expense 4,692
Operating Lease Location 3 [Member]  
Operating Lease, Expense 2,226
Operating Lease Location 4 [Member]  
Operating Lease, Expense 2,667
Operating Lease Location 5 [Member]  
Operating Lease, Expense $ 1,690