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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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- 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 + Details
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