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Fair Value - Summary Showing the Recurring Fair Value Measurements of the Contingent Consideration Liability (Details) - Recurring $ in Thousands | Feb. 28, 2021 USD ($) | May 31, 2020 USD ($)
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration, liabilities | $ 15,362 | $ 15,647
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration, liabilities | 15,362 | $ 15,647
Revenue based payments | Level 3 | Discounted cash flow |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration, liabilities | $ 15,362 |
Discount rate | Revenue based payments | Level 3 | Discounted cash flow |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration, liability, measurement input | 5 |
Probability of payment | Revenue based payments | Level 3 | Discounted cash flow | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration, liability, measurement input | 0.66 |
Probability of payment | Revenue based payments | Level 3 | Discounted cash flow | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration, liability, measurement input | 1 |

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