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v3.19.3.a.u2

Basis of Presentation (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2020 USD ($) $ / $ | Jan. 31, 2019 USD ($) | Jan. 31, 2020 USD ($) $ / $ | Jan. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment charges related to goodwill | $ 0 | $ 0 | $ 0 | $ 0
Other intangible assets |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment charges related to other intangible assets | 0 | $ 0 | 0 | $ 0
Foreign Exchange Forward | Not Designated as Hedging Instrument |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Derivative, notional amount | 115,700,000 |  | 115,700,000 |
Foreign Exchange Forward | Not Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Derivative asset, fair value, gross asset | $ 200,000 |  | $ 200,000 |
Minimum |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets estimated useful lives |  |  | 3 years |
Minimum | Foreign Exchange Forward | Not Designated as Hedging Instrument |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Derivative, forward exchange rate | $ / $ | 19.74 |  | 19.74 |
Maximum |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets estimated useful lives |  |  | 6 years |
Long | Maximum | Foreign Exchange Forward | Not Designated as Hedging Instrument |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Derivative, forward exchange rate | $ / $ | 19.91 |  | 19.91 |

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