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Stock-Based Compensation - Director Stock Awards (Details) - Director Stock Plan - Class A Common Stock - Non-Employee Directors - shares	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Value of annual award as percentage of annual director retainer fee based on stock price on date of grant	100.00%
Deferred compensation arrangement with individual, shares issued	30,706	18,384	28,360

X

- Definition

The value of the annual award of Class A Common Stock received by each non-employee director as a percentage of the annual director fee, based on the stock price on the date of grant.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

Number of shares issued pursuant to the terms of a deferred compensation arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (l)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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