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INCOME TAXES (Details Narrative) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
May 31, 2024 | May 31, 2023 | May 31, 2022 | May 31, 2021
Valuation allowance | $ (21,900) | $ (1,100) | $ (300) |
Unrecognized tax benefit | 2,484 | 2,276 | $ 2,018 | $ 1,928
Federal |  |  |  |
Net operating loss carryforward | (34,600) | (47,000) |  |
Research and development tax credit carryforwards | 3,300 | 2,900 |  |
Alternative minimum tax credit carryforwards |  | 14,400 |  |
State |  |  |  |
Net operating loss carryforward | (29,800) | (30,200) |  |
Research and development tax credit carryforwards | $ 7,100 | 6,600 |  |
Alternative minimum tax credit carryforwards |  | $ 30 |  |

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