5. Maintenance and Other Inventory (Details) - USD ($)	12 Months Ended
May 31, 2023	May 31, 2022
Details
Inventory disposed of	$ 322,000	$ 772,000
Provision for potential inventory obsolescence	$ 295,000	$ 0

Represents the monetary amount of Provision for potential inventory obsolescence, during the indicated time period.

No definition available.

Name:	fil_ProvisionForPotentialInventoryObsolescence
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration