Note 4 - Property, Plant and Equipment (Tables)

3 Months Ended

Aug. 31, 2023

Notes Tables

Property, Plant and Equipment [Table Text Block]

	August 31, 2023			May 31, 2023
Production machinery and equipment	$	66,846,425		$	66,068,625
Plant buildings and land		2,364,089			2,364,089
Leasehold improvements		1,598,738			1,553,138
Furniture and fixtures		542,057			542,057
		71,351,309			70,527,909
Less: Accumulated depreciation and amortization		(38,738,203	)		(37,343,203	)
Net Property, Plant and Equipment	$	32,613,106		$	33,184,706