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Disaggregated Revenue by Geographic Location (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 28, 2019 | Feb. 28, 2018 | Feb. 28, 2019 | Feb. 28, 2018 | May 31, 2018 | May 31, 2017
Schedule Of Geographical Information [Line Items] |  |  |  |  |  |
Total revenue | $ 97,700 | $ 94,903 | $ 304,424 | $ 289,811 | $ 397,930 | $ 358,277
Domestic |  |  |  |  |  |
Schedule Of Geographical Information [Line Items] |  |  |  |  |  |
Total revenue | 57,422 | 57,825 | 182,298 | 180,414 |  |
International |  |  |  |  |  |
Schedule Of Geographical Information [Line Items] |  |  |  |  |  |
Total revenue | $ 40,278 | $ 37,078 | $ 122,126 | $ 109,397 |  |

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