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Fair Value of Financial Instruments - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Nov. 03, 2019	Apr. 28, 2019	Oct. 28, 2018
Premier Money Market Fund [Member]
Assets:
Investments at fair value	$ 7,133	$ 6,639	$ 6,943
Large Blend Fund [Member]
Assets:
Investments at fair value			422
Growth Allocation Fund [Member]
Assets:
Investments at fair value	222	203	175
Moderate Allocation Fund [Member]
Assets:
Investments at fair value	132	127	114
Other [Member]
Assets:
Investments at fair value	88	112	197
Quoted prices in active markets for identical assets - Level 1 [Member] | Premier Money Market Fund [Member]
Assets:
Investments at fair value	7,133	6,639	6,943
Quoted prices in active markets for identical assets - Level 1 [Member] | Large Blend Fund [Member]
Assets:
Investments at fair value			422
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Fund [Member]
Assets:
Investments at fair value	222	203	175
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Fund [Member]
Assets:
Investments at fair value	132	127	114
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member]
Assets:
Investments at fair value	$ 88	$ 112	$ 197

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- References

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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