Note 5 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)	Feb. 28, 2026	May 31, 2025
Property, Plant and Equipment, Gross	$ 80,352,021	$ 78,751,850
Less: Accumulated depreciation and amortization	(53,151,589)	(48,706,964)
Net Property, Plant and Equipment	27,200,432	30,044,886
Machinery and Equipment [Member]
Property, Plant and Equipment, Gross	72,725,304	71,908,843
Net Property, Plant and Equipment	39,010
Plant Buildings and Land [Member]
Property, Plant and Equipment, Gross	3,930,207	3,930,207
Leasehold Improvements [Member]
Property, Plant and Equipment, Gross	3,154,453	2,370,743
Furniture and Fixtures [Member]
Property, Plant and Equipment, Gross	$ 542,057	$ 542,057