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Geographic Information (Tables)

9 Months Ended

Feb. 28, 2019

Geographic Information Disclosure [Abstract]

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

	Nine Months Ended						Three Months Ended
						February 28, 2019							February 28, 2018			February 28, 2019			February 28, 2018
Revenues from sales to unaffiliated customers:
United States	$	423,000		$	533,000		$	141,000		$	208,000
Asia		1,973,000			2,112,000			653,000			626,000
Europe		1,330,000			1,562,000			416,000			485,000
South America		129,000			106,000			2,000			3,000
Middle East		180,000			115,000			49,000			54,000
Other		--			6,000			--			--
	$	4,035,000		$	4,434,000		$	1,261,000		$	1,376,000

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph a
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599

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