NOTE 9 - OPERATING LEASE (Details) - USD ($)	3 Months Ended	6 Months Ended
Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Jul. 10, 2019
Details
Lease from Metformin Production Line					$ 436,000
Revenue - Lease from Metformin Production Line	$ 106,647	$ 100,809	$ 213,429	$ 198,201

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