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Fair Value of Financial Instruments - Recurring Basis (Detail) - USD ($) $ in Thousands	Nov. 01, 2015	May. 03, 2015	Nov. 02, 2014
Premier Money Market Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	$ 2,703	$ 2,285	$ 1,818
Intermediate Term Bond Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	2,144	2,181	1,661
Low Duration Bond Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	2,098	2,096	2,081
Limited Term Bond Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	1,094	3,107	2,576
Strategic Income Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	984	1,008
Large Blend Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	279
Growth Allocation Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	125	85
Mid Cap Value Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	94
Other [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	78	45	93
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	2,703	2,285	1,818
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	2,144	2,181	1,661
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	2,098	2,096	2,081
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	1,094	3,107	2,576
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	984	1,008
Quoted prices in active markets for identical assets - Level 1 [Member] | Large Blend Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	279
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	125	85
Quoted prices in active markets for identical assets - Level 1 [Member] | Mid Cap Value Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	94
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	$ 78	$ 45	$ 93

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- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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- Definition

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