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Fair Value of Financial Instruments - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands | Feb. 02, 2020 | Apr. 28, 2019 | Jan. 27, 2019
--- | --- | --- | ---
Premier Money Market Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | $ 6,334 | $ 6,639 | $ 6,433
Short Term Bond Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 4,743 |  |
Inflation Protected Bond Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 2,837 |  |
Strategic Income Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 1,001 |  |
Growth Allocation Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 239 | 203 | 184
Moderate Allocation Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 138 | 127 | 119
Other [Member] |  |  |
Assets: |  |  |
Investments at fair value | 92 | 112 | 98
Quoted prices in active markets for identical assets - Level 1 [Member] | Premier Money Market Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 6,334 | 6,639 | 6,433
Quoted prices in active markets for identical assets - Level 1 [Member] | Short Term Bond Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 4,743 |  |
Quoted prices in active markets for identical assets - Level 1 [Member] | Inflation Protected Bond Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 2,837 |  |
Quoted prices in active markets for identical assets - Level 1 [Member] | Strategic Income Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 1,001 |  |
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 239 | 203 | 184
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 138 | 127 | 119
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member] |  |  |
Assets: |  |  |
Investments at fair value | $ 92 | $ 112 | $ 98

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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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