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Accrued Liabilities (Details) - USD ($) $ in Thousands | Aug. 31, 2023 | May 31, 2023
--- | --- | ---
Payables and Accruals [Abstract] |  |
Payroll and related expenses | $ 10,803 | $ 9,232
Royalties | 1,649 | 2,874
Outside services | 5,593 | 7,088
Research and development | 1,847 | 1,525
Sales and franchise taxes | 1,088 | 480
Rebates | 485 | 469
Accrued Freight | 450 | 450
Deferred Warranties | 492 | 475
Accrued severance | 179 | 262
Other | 3,009 | 3,321
Total accrued liabilities | $ 26,079 | $ 26,617

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