Long-Term Debt and Lines of Credit - Long-Term Debt - Narrative (Detail) $ in Thousands		3 Months Ended
	Aug. 11, 2015 USD ($) Payment	Aug. 02, 2015 USD ($)	May. 03, 2015 USD ($)	Aug. 03, 2014 USD ($)	Aug. 11, 2008 USD ($)
Debt Instrument [Line Items]
Long-term debt		$ 2,200	$ 2,200	$ 4,400
Unsecured senior term notes [Member]
Debt Instrument [Line Items]
Issuance of unsecured senior term notes					$ 11,000
Fixed interest rate					8.01%
Term of the note agreement		7 years
Required amount of principal payment installments		$ 2,200
Required debt payment frequency		Annual
Date of first required principal payment		Aug. 11, 2011
Long-term debt, fair value		$ 2,300	$ 2,300	$ 4,600
Unsecured senior term notes [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Remaining annual payment paid	$ 2,200
Number of remaining annual payment paid | Payment	1