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Shareholders' Equity -Director Awards (Details) - shares	6 Months Ended
	Oct. 31, 2020	Oct. 26, 2019
Director | RSAs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted in period (in shares)	33,000	30,000

X

- 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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- Definition

Number of shares issued under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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