BUSINESS SEGMENTS (Tables)

12 Months Ended

May 31, 2016

Segment Reporting [Abstract]

Revenue from External Customers by Geographic Areas [Table Text Block]

	2016		2015
Net sales:
Europe	$	2,166,000	$	2,716,000
United States		995,000		1,042,000
Asia		1,731,000		1,016,000
South America		67,000		21,000
Middle East		180,000		143,000
Other foreign		1,000		24,000
Total net sales	$	5,140,000	$	4,962,000