Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended
	Jul. 31, 2022	Apr. 30, 2022
Critical Accounting Policies [Line Items]
Revenues recognized from performance obligations satisfied or partially satisfied	$ 0
Amounts allocated to performance obligations remain unsatisfied or partially unsatisfied	0
Valuation allowances	4,463,515	$ 4,543,819
Operating Loss Carryforwards, Valuation Allowance	$ 4,463,515	$ 4,543,819