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Other Expense (Income), Net (Parenthetical) (Detail) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 30, 2018 | May 31, 2020 | May 31, 2019 | Nov. 27, 2018
Other Income And Expenses [Line Items] |  |  |  |  |
Terminated license agreement charge |  |  | $ 5,300 |  |
Loss on extinguishment of debt | [1] |  |  | $ 3,051 |
2.25% Convertible Senior Notes |  |  |  |  |
Other Income And Expenses [Line Items] |  |  |  |  |
Debt, interest rate |  | 2.25% |  |  | 2.25%
Debt instrument redemption period |  | 2018-11 |  |  |
Loss on extinguishment of debt |  | $ 3,100 |  |  |
[1] | Reflects the loss incurred upon divestiture of a contracting business located in Australia, which had reported through our PCG segment. In connection with the redemption of all of our outstanding 2.25% convertible senior notes in November 2018, we recognized a loss of $3.1 million, due to the fair value remeasurement on the date of conversion

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