Geographic Information (Tables)

9 Months Ended

Feb. 28, 2014

Geographic Information Disclosure [Abstract]

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

	Nine Months Ended				Three Months Ended
	February 28,				February 28,
	2014		2013		2014		2013
Revenues from sales to unaffiliated customers:
United States	$	951,000	$	654,000	$	446,000	$	217,000
Asia		599,000		2,503,000		383,000		559,000
Europe		1,797,000		1,810,000		598,000		627,000
South America		12,000		5,000		5,000		3,000
Middle East		65,000		28,000		45,000		10,000
Other		17,000		2,000		16,000		1,000
Total	$	3,441,000	$	5,002,000	$	1,493,000	$	1,417,000