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Geographic Information (Details) - Financial information about foreign and domestic operations and export sales (USD $)	3 Months Ended		9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Revenues from sales to unaffiliated customers:
Net Sales	$ 1,492,719	$ 1,416,698	$ 3,441,299	$ 5,002,418
United States [Member]
Revenues from sales to unaffiliated customers:
Net Sales	446,000	217,000	951,000	654,000
Asia [Member]
Revenues from sales to unaffiliated customers:
Net Sales	383,000	559,000	599,000	2,503,000
Europe [Member]
Revenues from sales to unaffiliated customers:
Net Sales	598,000	627,000	1,797,000	1,810,000
South America [Member]
Revenues from sales to unaffiliated customers:
Net Sales	5,000	3,000	12,000	5,000
Middle East [Member]
Revenues from sales to unaffiliated customers:
Net Sales	45,000	10,000	65,000	28,000
Other Foreign [Member]
Revenues from sales to unaffiliated customers:
Net Sales	$ 16,000	$ 1,000	$ 17,000	$ 2,000

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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