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BUSINESS SEGMENTS (Tables) | 12 Months Ended
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May 31, 2018
Segment Reporting [Abstract] |
Revenue from External Customers by Geographic Areas [Table Text Block] |
Years ended May 31, | 2018 |  | 2017
Net sales: |  |  |  |  |
Europe | $ | 2,023,000 |  | $ | 2,238,000
United States |  | 685,000 |  |  | 874,000
Asia |  | 2,506,000 |  |  | 2,412,000
South America |  | 214,000 |  |  | 65,000
Middle East |  | 132,000 |  |  | 186,000
Other foreign |  | 4,000 |  |  | 17,000
Total net sales | $ | 5,564,000 |  | $ | 5,792,000

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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 + Details
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