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Long-Term Debt and Lines of Credit (Detail) - USD ($)
$ in Thousands
Nov. 01, 2015
May. 03, 2015
Nov. 02, 2014
Debt Disclosure [Abstract]      
Unsecured senior term notes   $ 2,200 $ 2,200
Current maturities of long-term debt   (2,200) [1] (2,200)
Long-term debt, less current maturities of long-term debt $ 0 $ 0 $ 0
[1] Derived from audited financial statements.