Leases (Supplemental Cash Flow Information Related To Leases) (Details) - USD ($)	6 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Leases [Abstract]
Operating cash flows from finance leases	$ 185,833	$ 137,982
Operating cash flows from operating leases	166,664	198,729
Financing cash flows from finance leases	764,377	952,597
Right-of-use assets obtained in exchange for new finance lease liabilities	1,599,456	1,558,579
Right-of-use assets obtained in exchange for operating lease liabilities	$ 43,641