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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 27, 2014	Apr. 28, 2013	Apr. 29, 2012
Statement Of Income And Comprehensive Income [Abstract]
net income	$ 17,447	$ 18,317	$ 13,296
Other comprehensive (loss) income
Unrealized (loss) gain on investments, net of taxes	(114)	38	16
Total other comprehensive (loss) income	(114)	38	16
Comprehensive income	$ 17,333	$ 18,355	$ 13,312

X

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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