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Geographic Information (Details) - Geographic Information (USD $)	3 Months Ended		6 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2013	Nov. 30, 2012
Revenues from sales to unaffiliated customers:
Net Sales	$ 934,841	$ 1,883,771	$ 1,948,580	$ 3,585,719
United States [Member]
Revenues from sales to unaffiliated customers:
Net Sales	251,000	157,000	505,000	437,000
Asia [Member]
Revenues from sales to unaffiliated customers:
Net Sales	80,000	1,042,000	216,000	1,944,000
Europe [Member]
Revenues from sales to unaffiliated customers:
Net Sales	594,000	675,000	1,199,000	1,183,000
South America [Member]
Revenues from sales to unaffiliated customers:
Net Sales	4,000	2,000	7,000	2,000
Middle East [Member]
Revenues from sales to unaffiliated customers:
Net Sales	5,000	7,000	20,000	18,000
Other Foreign [Member]
Revenues from sales to unaffiliated customers:
Net Sales	$ 1,000	$ 1,000	$ 2,000	$ 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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