Note 4 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)	May 31, 2024	May 31, 2023
Property, Plant and Equipment, Gross	$ 73,023,032	$ 70,527,909
Less: Accumulated depreciation	(42,956,911)	(37,343,203)
Property, Plant and Equipment, net	30,066,119	33,184,706
Machinery and Equipment [Member]
Property, Plant and Equipment, Gross	68,532,989	66,068,625
Plant Buildings and Land [Member]
Property, Plant and Equipment, Gross	2,289,233	2,364,089
Leasehold Improvements [Member]
Property, Plant and Equipment, Gross	1,658,751	1,553,138
Furniture and Fixtures [Member]
Property, Plant and Equipment, Gross	$ 542,057	$ 542,057