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GEOGRAPHIC INFORMATION (Tables) | 9 Months Ended
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Feb. 28, 2022
Geographic Information Disclosure [Abstract] |
Revenue from External Customers by Geographic Areas [Table Text Block] |
|  | Three Months Ended February 28, |  | Nine Months Ended February 28,
|  | 2022 |  | 2021 |  | 2022 |  | 2021
Revenues from sales to unaffiliated customers: |  |  |  |  |  |  |  |  |  |  |  |
Asia |  | $ | 4,877,000 |  | $ | 756,000 |  | $ | 8,925,000 |  | $ | 1,653,000
Europe |  |  | 2,416,000 |  |  | 2,611,000 |  |  | 3,683,000 |  |  | 3,781,000
North America |  |  | 286,000 |  |  | 133,000 |  |  | 820,000 |  |  | 374,000
South America |  |  | 81,000 |  |  | 64,000 |  |  | 87,000 |  |  | 146,000
Middle East |  |  | - |  |  | 65,000 |  |  | 54,000 |  |  | 191,000
|  | $ | 7,660,000 |  | $ | 3,629,000 |  | $ | 13,569,000 |  | $ | 6,145,000

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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 https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599 + Details
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