Geographic Information (Tables)

3 Months Ended

Aug. 31, 2015

Geographic Information Disclosure [Abstract]

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

	Three Months Ended  August 31,
	2015		2014
Revenues from sales to unaffiliated customers:
United States	$	187,000	$	253,000
Asia		433,000		16,000
Europe		619,000		752,000
South America		17,000		3,000
Middle East		31,000		2,000
Other		--		9,000
	$	1,287,000	$	1,035,000