Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Subsequent Events (Details) - USD ($)	12 Months Ended
Subsequent Events (Details) - USD ($)	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019	May 25, 2021
Subsequent Event [Line Items]
Restructuring charges, net	$ 5,848,000	$ (18,000)	$ 1,987,000
Employee Severance and Separation [Member]
Subsequent Event [Line Items]
Restructuring charges, net	$ 1,739,000
Subsequent Event \| Share Repurchase Program 2021
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount				$ 100,000,000