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Segment Disclosure - Net Sales and Long-lived Assets by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 27, 2013	Jul. 28, 2012	Apr. 27, 2013
Net sales:
United States	$ 115,451	$ 115,759
Outside U.S.	23,271	17,160
Net sales	138,722	132,919
Long-lived assets:
United States	60,291		60,060
Outside U.S.	4,235		1,565
Long-lived assets	$ 64,526		$ 61,625

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Amount of long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets, located in the entity's country of domicile.

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