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Fair Value - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Oct. 29, 2023	Apr. 30, 2023	Oct. 30, 2022
U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	$ 7,060	$ 7,649	$ 9,089
Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	560	528	438
Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	46	86	77
Other [Member]
Assets:
Investments at fair value	266	208	159
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	7,060	7,649	9,089
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	560	528	438
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	46	86	77
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member]
Assets:
Investments at fair value	$ 266	$ 208	$ 159

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- References

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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