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Fair Value of Financial Instruments - Recurring Basis (Detail) - USD ($) $ in Thousands | Aug. 02, 2015 | May. 03, 2015 | Aug. 03, 2014
--- | --- | --- | ---
Limited Term Bond Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | $ 1,092 | $ 3,107 | $ 2,578
Premier Money Market Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 2,705 | 2,285 | 1,712
Intermediate Term Bond Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 2,149 | 2,181 | 1,655
Low Duration Bond Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 2,100 | 2,096 | 2,078
Strategic Income Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 995 | 1,008 |
Growth Allocation Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 109 | 85 |
Other [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 79 | 45 | 37
Quoted prices in active markets for identical assets - Level 1 [Member] | Limited Term Bond Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 1,092 | 3,107 | 2,578
Quoted prices in active markets for identical assets - Level 1 [Member] | Premier Money Market Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 2,705 | 2,285 | 1,712
Quoted prices in active markets for identical assets - Level 1 [Member] | Intermediate Term Bond Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 2,149 | 2,181 | 1,655
Quoted prices in active markets for identical assets - Level 1 [Member] | Low Duration Bond Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 2,100 | 2,096 | 2,078
Quoted prices in active markets for identical assets - Level 1 [Member] | Strategic Income Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 995 | 1,008 |
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Fund [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 109 | 85 |
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Assets measured at fair value on a recurring basis | $ 79 | $ 45 | $ 37

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