11. Earnings Per Common Share: Schedule of Earnings Per Common Share (Details) - shares	12 Months Ended
May 31, 2024	May 31, 2023
Details
Average common shares outstanding	3,353,077	3,506,474
Common shares issuable under stock option plans	135,711	45,020
Average common shares outstanding assuming dilution	3,488,788	3,551,494

Represents the Average common shares outstanding assuming dilution (number of shares), during the indicated time period.

No definition available.

Name:	fil_AverageCommonSharesOutstandingAssumingDilution
Namespace Prefix:	fil_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration