GEOGRAPHIC INFORMATION

12 Months Ended

May 31, 2020

Geographic Information Disclosure [Abstract]

Geographic Information Disclosure [Text Block]

 7.    GEOGRAPHIC INFORMATION

 The Company operates as one segment. Geographic information regarding net sales is approximately as follows:

Years ended May 31,	2020		2019
Net sales:
Europe	$	2,434,000	$	1,694,000
United States		445,000		523,000
Asia		1,867,000		2,514,000
South America		1,615,000		256,000
Middle East		314,000		214,000
Other foreign		18,000		--
Total net sales	$	6,693,000	$	5,201,000