Accounting Policies Revenue recognition policy (Details)	12 Months Ended
Apr. 30, 2024	Apr. 30, 2023
Revenue recognition policy [Abstract]
Revenue, Transaction Price Measurement, Tax Exclusion [true false]	true	true

Indicates (true false) whether accounting policy was elected to exclude from measurement of transaction price tax assessed by governmental authority that was both imposed on and concurrent with specific revenue-producing transaction, and collected from customer. Includes, but is not limited to, sales, use, value-added, and excise tax.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 32
-Paragraph 2A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479866/606-10-32-2A

Name:	us-gaap_RevenueTransactionPriceMeasurementTaxExclusion
Namespace Prefix:	us-gaap_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration