Legal Proceedings - Additional Information (Detail) $ in Thousands			3 Months Ended	6 Months Ended
	Nov. 27, 2013 LegalMatter	Jun. 14, 2013 LegalMatter	Oct. 29, 2016 USD ($)	Oct. 29, 2016 USD ($)
Legal Claim
Loss Contingencies [Line Items]
Number of putative shareholder derivative complaints filed | LegalMatter		1
Damages awarded				$ 1,330
Legal Claim | Pending Litigation
Loss Contingencies [Line Items]
Amount of damages sought			$ 1,059
Counter claim for damages sought			$ 105
Carag
Loss Contingencies [Line Items]
Number of putative shareholder derivative complaints filed | LegalMatter	1