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v3.23.1

SEGMENT AND CONCENTRATION INFORMATION (Details Narrative) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Feb. 28, 2023 | Feb. 28, 2022 | Feb. 28, 2023 | Feb. 28, 2022 | May 31, 2022
Operating lease right-of-use assets | $ 6,293,000 |  | $ 6,293,000 |  | $ 917,000
United States [Member] |  |  |  |  |
Operating lease right-of-use assets | 6,169,000 |  | 6,169,000 |  | 822,000
Asia [Member] |  |  |  |  |
Operating lease right-of-use assets | $ 76,000 |  | $ 76,000 |  | $ 95,000
Five Largest Customers [Member] |  |  |  |  |
Customers accounted for 10% or more of total revenues | 98.00% | 99.00% | 97.00% | 97.00% |
Customer A [Member] |  |  |  |  |
Customers accounted for 10% or more of total revenues | 12.00% | 90.00% | 16.00% | 84.00% |
Customers B [Member] |  |  |  |  |
Customers accounted for 10% or more of total revenues | 82.00% |  | 77.00% |  |
Europe |  |  |  |  |
Operating lease right-of-use assets | $ 48,000 |  | $ 48,000 |  |

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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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