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Fair Value of Financial Instruments - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands | May 02, 2021 | May 03, 2020
--- | --- | ---
Premier Money Market Fund [Member] |  |
Assets: |  |
Investments at fair value | $ 7,879 | $ 7,496
Short Term Bond Mutual Funds [Member] |  |
Assets: |  |
Investments at fair value | 4,101 | 923
Short Duration Inflation Protected Mutual Fund [Member] |  |
Assets: |  |
Investments at fair value | 722 |
Mortgage Securities Mutual Fund [Member] |  |
Assets: |  |
Investments at fair value | 719 |
Growth Allocation Mutual Funds [Member] |  |
Assets: |  |
Investments at fair value | 339 | 219
Moderate Allocation Mutual Fund [Member] |  |
Assets: |  |
Investments at fair value | 86 | 63
Other [Member] |  |
Assets: |  |
Investments at fair value | 111 | 56
Quoted prices in active markets for identical assets - Level 1 [Member] | Premier Money Market Fund [Member] |  |
Assets: |  |
Investments at fair value | 7,879 | 7,496
Quoted prices in active markets for identical assets - Level 1 [Member] | Short Term Bond Mutual Funds [Member] |  |
Assets: |  |
Investments at fair value | 4,101 | 923
Quoted prices in active markets for identical assets - Level 1 [Member] | Short Duration Inflation Protected Mutual Fund [Member] |  |
Assets: |  |
Investments at fair value | 722 |
Quoted prices in active markets for identical assets - Level 1 [Member] | Mortgage Securities Mutual Fund [Member] |  |
Assets: |  |
Investments at fair value | 719 |
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Mutual Funds [Member] |  |
Assets: |  |
Investments at fair value | 339 | 219
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Mutual Fund [Member] |  |
Assets: |  |
Investments at fair value | 86 | 63
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member] |  |
Assets: |  |
Investments at fair value | $ 111 | $ 56

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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 http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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