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Reconciliation of Our Tax Uncertainties (Detail) - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2020 | May 31, 2019 | May 31, 2018
Income Tax Contingency [Line Items] |  |  |
Beginning balance | $ 611 | $ 598 | $ 1,633
Increase/(decrease) related to prior periods | 56 | (106) | (1,157)
Increase to current period | 213 | 119 | 122
Ending balance | $ 880 | $ 611 | $ 598

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- Definition Unrecognized Tax Benefits Increase Decrease Resulting From Prior Period Tax Positions + References No definition available. + Details
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