4. Costs and Estimated Earnings on Uncompleted Contracts (Details) - USD ($)	12 Months Ended
May 31, 2024	May 31, 2023
Details
Revenues Recognized For amounts included in billings in excess of costs and estimated earnings	$ 1,992,000	$ 1,123,000

Represents the monetary amount of Revenues Recognized For amounts included in billings in excess of costs and estimated earnings, during the indicated time period.

No definition available.

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