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Fair Value - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Apr. 30, 2023	May 01, 2022
U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	$ 7,649	$ 8,683
Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	528	435
Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	86	81
Other [Member]
Assets:
Investments at fair value	208	158
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	7,649	8,683
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	528	435
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	86	81
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member]
Assets:
Investments at fair value	$ 208	$ 158

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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