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Fair Value - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands | Apr. 28, 2024 | Apr. 30, 2023
--- | --- | ---
U.S. Government Money Market Fund [Member] |  |
Assets: |  |
Investments at fair value | $ 6,910 | $ 7,649
Growth Allocation Mutual Funds [Member] |  |
Assets: |  |
Investments at fair value | 691 | 528
Moderate Allocation Mutual Fund [Member] |  |
Assets: |  |
Investments at fair value | 46 | 86
Other [Member] |  |
Assets: |  |
Investments at fair value | 358 | 208
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Government Money Market Fund [Member] |  |
Assets: |  |
Investments at fair value | 6,910 | 7,649
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Mutual Funds [Member] |  |
Assets: |  |
Investments at fair value | 691 | 528
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Mutual Fund [Member] |  |
Assets: |  |
Investments at fair value | 46 | 86
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member] |  |
Assets: |  |
Investments at fair value | $ 358 | $ 208

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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/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -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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