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INCOME TAXES (Details 4) - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2024 | May 31, 2023 | May 31, 2022
INCOME TAXES |  |  |
Unrecognized tax benefit, beginning | $ 2,276 | $ 2,018 | $ 1,928
Increases related to prior year tax positions | 35 | 90 | 12
Decreases related to prior year tax positions | (28) |  |
Increases related to current year tax positions | 233 | 168 | 78
Decreases related to current year tax positions | (32) |  |
Unrecognized tax benefit, ending | $ 2,484 | $ 2,276 | $ 2,018

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