14. Retirement Plan (Details) - USD ($)	12 Months Ended
May 31, 2026	May 31, 2025
Details
Pension and Other Postretirement Benefits Cost (Reversal of Cost)	$ 471,767	$ 462,445

Amount of cost (reversal of cost) for pension and other postretirement benefits.

No definition available.

Name:	us-gaap_PensionAndOtherPostretirementBenefitExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration