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GEOGRAPHIC INFORMATION (Details) - MEXICO | 6 Months Ended |
--- | --- | ---
Nov. 30, 2021 USD ($) | May 31, 2021 USD ($)
GEOGRAPHIC INFORMATION (Details) [Line Items] |  |
Number of Reportable Segments | 1 |
Inventory, Gross | $ 574,000 | $ 803,000
Property, Plant and Equipment, Net | $ 22,000 | $ 25,000

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