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Geographic Information (Tables)

6 Months Ended

Nov. 30, 2017

Geographic Information Disclosure [Abstract]

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

	Six Months Ended November 30,						Three Months Ended November 30,
						2017							2016			2017			2016
Revenues from sales to unaffiliated customers:
United States	$	325,000		$	398,000		$	138,000		$	172,000
Asia		1,494,000			1,292,000			873,000			716,000
Europe		1,069,000			1,018,000			538,000			464,000
South America		103,000			30,000			28,000			14,000
Middle East		61,000			91,000			35,000			53,000
Other		6,000			13,000			2,000			13,000
	$	3,058,000		$	2,842,000		$	1,614,000		$	1,432,000

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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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