Fair Value of Financial Instruments - Recurring Basis (Detail) - USD ($) $ in Thousands	Jul. 31, 2016	May 01, 2016	Aug. 02, 2015
Premier Money Market Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	$ 3,950	$ 3,404	$ 2,705
Low Duration Bond Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	1,073	1,604	2,100
Intermediate Term Bond Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	754	1,154	2,149
Strategic Income Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	597	999	995
Limited Term Bond Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis		602	1,092
Large Blend Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	310	289
Growth Allocation Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	97	148	109
Mid Cap Value Fund [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	117	102
Other [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a recurring basis	147	82	79
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	3,950	3,404	2,705
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	1,073	1,604	2,100
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	754	1,154	2,149
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	597	999	995
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		602	1,092
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	310	289
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	97	148	109
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	117	102
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	$ 147	$ 82	$ 79