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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 03, 2014	Jul. 28, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 3,344	$ 3,230
Other comprehensive loss
Unrealized loss on investments	(10)	(135)
Total other comprehensive loss	(10)	(135)
Comprehensive income	$ 3,334	$ 3,095

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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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