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Geographic Information (Tables)

9 Months Ended

Feb. 28, 2017

Geographic Information Disclosure [Abstract]

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

	Nine Months Ended						Three Months Ended
						February 28, 2017							February 29, 2016			February 28, 2017			February 29, 2016
Revenues from sales to unaffiliated customers:
United States	$	743,000		$	776,000		$	345,000		$	370,000
Asia		1,740,000			1,219,000			448,000			367,000
Europe		1,672,000			1,634,000			654,000			543,000
South America		43,000			50,000			13,000			1,000
Middle East		127,000			134,000			37,000			81,000
Other		17,000			1,000			3,000			--
	$	4,342,000		$	3,814,000		$	1,500,000		$	1,362,000

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- References

No definition available.

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- Definition

Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph a
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599

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