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Fair Value - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands | Oct. 31, 2021 | May 02, 2021 | Nov. 01, 2020
--- | --- | --- | ---
U.S. Government Money Market Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | $ 8,351 |  |
Premier Money Market Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value |  | $ 7,879 | $ 7,665
Bond Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 4,384 | 4,101 | 5,462
Inflation Protected Bond Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 2,975 | 722 |
Mortgage Securities Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 1,118 | 719 |
Large Cap Equity Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 694 |  |
Growth Allocation Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 449 | 339 | 255
Preferred Securities Mutual Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 282 |  |
U.S. Event Driven Equity Mutual Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 203 |  |
Moderate Allocation Mutual Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 88 | 86 | 73
Other [Member] |  |  |
Assets: |  |  |
Investments at fair value | 201 | 111 | 67
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Government Money Market Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 8,351 |  |
Quoted prices in active markets for identical assets - Level 1 [Member] | Premier Money Market Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value |  | 7,879 | 7,665
Quoted prices in active markets for identical assets - Level 1 [Member] | Bond Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 4,384 | 4,101 | 5,462
Quoted prices in active markets for identical assets - Level 1 [Member] | Inflation Protected Bond Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 2,975 | 722 |
Quoted prices in active markets for identical assets - Level 1 [Member] | Mortgage Securities Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 1,118 | 719 |
Quoted prices in active markets for identical assets - Level 1 [Member] | Large Cap Equity Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 694 |  |
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Mutual Funds [Member] |  |  |
Assets: |  |  |
Investments at fair value | 449 | 339 | 255
Quoted prices in active markets for identical assets - Level 1 [Member] | Preferred Securities Mutual Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 282 |  |
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Event Driven Equity Mutual Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 203 |  |
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Mutual Fund [Member] |  |  |
Assets: |  |  |
Investments at fair value | 88 | 86 | 73
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member] |  |  |
Assets: |  |  |
Investments at fair value | $ 201 | $ 111 | $ 67

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