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Operating leases (Details)
9 Months Ended
Jan. 31, 2024
USD ($)
Operating Lease, Expense $ 260,300
Operating Lease Location 1 [Member]  
Operating Lease, Expense 22,667
Operating Lease Location 2 [Member]  
Operating Lease, Expense 5,647
Operating Lease Location 3 [Member]  
Operating Lease, Expense 1,000
Operating Lease Location 4 [Member]  
Operating Lease, Expense $ 550