Note 15 - Concentrations, Risks and Uncertainties (Details Textual)	12 Months Ended
	May 31, 2024 USD ($)	May 31, 2023 USD ($)
One Customer [Member]
Purchases From Customers	$ 769,000	$ 787,000
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Three to Four Customers [Member]
Concentration Risk, Percentage	81.00%	73.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Minimum [Member]
Number of Major Customers	3	3
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Maximum [Member]
Number of Major Customers	4	4
Customer Concentration Risk [Member] | Cost of Goods and Service Benchmark [Member]
Number of Major Customers	1	1