Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 27, 2013	Apr. 28, 2013		Oct. 28, 2012
Schedule of Accrued Liabilities [Line Items]
Compensation, commissions and related benefits	$ 8,567	$ 9,831		$ 7,775
Interest	74	111		112
Other accrued expenses	3,031	1,887		2,724
Accrued expenses	$ 11,672	$ 11,829	[1]	$ 10,611

[1] Derived from audited financial statements.