NOTE 9 - OPERATING LEASE (Details) - USD ($)	3 Months Ended	9 Months Ended
Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021	Jul. 10, 2019
Details
Lease from Metformin Production Line					$ 436,000
Revenue - Lease from Metformin Production Line	$ 107,991	$ 104,866	$ 321,420	$ 303,067

Represents the monetary amount of Revenue - Lease from Metformin Production Line, during the indicated time period.

No definition available.

Name:	fil_RevenueLeaseFromMetforminProductionLine
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration