The value (monetary amount) of the award the plaintiff seeks in the legal matter.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Name:	us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Legal Proceedings - Additional Information (Detail) $ in Thousands				3 Months Ended
	Aug. 05, 2016 USD ($)	Nov. 27, 2013 LegalMatter	Jun. 14, 2013 LegalMatter	Jul. 30, 2016 USD ($)
Legal Claim
Loss Contingencies [Line Items]
Number of putative shareholder derivative complaints filed \| LegalMatter			1
Damages awarded \| $				$ 1,330
Legal Claim \| Subsequent Event \| Pending Litigation
Loss Contingencies [Line Items]
Amount of damages sought \| $	$ 1,059
Carag
Loss Contingencies [Line Items]
Number of putative shareholder derivative complaints filed \| LegalMatter		1