Fair Value Measurements - Fair Value of Derivative Liabilities (Details) - USD ($) $ in Thousands	Jul. 31, 2022	Apr. 30, 2022
Interest rate swap agreements \| Level 2 \| Fair Value, Measurements, Recurring
Fair Value Measurements
Derivative liabilities	$ 1,803	$ (1,136)

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313

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