Note 4 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)	May 31, 2025	May 31, 2024
Property, Plant and Equipment, Gross	$ 78,751,850	$ 73,023,030
Less: Accumulated depreciation and amortization	(48,706,964)	(42,956,911)
Net Property, Plant and Equipment	30,044,886	30,066,119
Machinery and Equipment [Member]
Property, Plant and Equipment, Gross	71,908,843	68,532,989
Net Property, Plant and Equipment	39,925	812,532
Plant Buildings and Land [Member]
Property, Plant and Equipment, Gross	3,930,207	2,289,233
Leasehold Improvements [Member]
Property, Plant and Equipment, Gross	2,370,743	1,658,751
Furniture and Fixtures [Member]
Property, Plant and Equipment, Gross	$ 542,057	$ 542,057