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Geographic Information (Details) - Financial information about foreign and domestic operations and export sales (USD $)	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Revenues from sales to unaffiliated customers:
Net sales	$ 1,034,450	$ 1,013,739
UNITED STATES
Revenues from sales to unaffiliated customers:
Net sales	253,000	255,000
Asia [Member]
Revenues from sales to unaffiliated customers:
Net sales	16,000	136,000
Europe [Member]
Revenues from sales to unaffiliated customers:
Net sales	752,000	604,000
South America [Member]
Revenues from sales to unaffiliated customers:
Net sales	3,000	3,000
Middle East [Member]
Revenues from sales to unaffiliated customers:
Net sales	2,000	15,000
Other Foreign [Member]
Revenues from sales to unaffiliated customers:
Net sales	$ 9,000	$ 1,000

X

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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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