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Fair Value - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands | Jul. 31, 2022 | May 01, 2022 | Aug. 01, 2021
--- | --- | --- | ---
U.S. Government Money Market Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | $ 8,853 | $ 8,683 | $ 8,205
Large Cap Equity Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value |  |  | 708
U.S. Event Driven Equity Mutual Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value |  |  | 194
Moderate Allocation Mutual Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 82 | 81 | 91
Other [Member] |  |  |
Assets: |  |  |
Investments at fair value | 168 | 158 | 163
Growth Allocation Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 464 | 435 | 419
Bond Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value |  |  | 4,656
Inflation Protected Bond Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value |  |  | 2,979
Mortgage Securities Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value |  |  | 1,124
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Government Money Market Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 8,853 | 8,683 | 8,205
Quoted prices in active markets for identical assets - Level 1 [Member] | Large Cap Equity Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value |  |  | 708
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Event Driven Equity Mutual Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value |  |  | 194
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Mutual Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 82 | 81 | 91
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member] |  |  |
Assets: |  |  |
Investments at fair value | 168 | 158 | 163
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | $ 464 | $ 435 | 419
Quoted prices in active markets for identical assets - Level 1 [Member] | Bond Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value |  |  | 4,656
Quoted prices in active markets for identical assets - Level 1 [Member] | Inflation Protected Bond Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value |  |  | 2,979
Quoted prices in active markets for identical assets - Level 1 [Member] | Mortgage Securities Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value |  |  | $ 1,124

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