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Marketable Securities - Available-for-sale Securities (Details) (USD $) In Thousands, unless otherwise specified	Aug. 02, 2014	Apr. 26, 2014
Schedule of Available-for-sale Securities
Amortized Cost	$ 25,476	$ 25,392
Unrealized Gains	14	14
Unrealized Losses	(11)	(8)
Fair Value	25,479	25,398
Certificates of deposit
Schedule of Available-for-sale Securities
Amortized Cost	7,962	7,734
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	7,962	7,734
U.S. Government securities
Schedule of Available-for-sale Securities
Amortized Cost	1,500	2,000
Unrealized Gains	2	2
Unrealized Losses	0	0
Fair Value	1,502	2,002
U.S. Government sponsored entities
Schedule of Available-for-sale Securities
Amortized Cost	9,149	8,349
Unrealized Gains	0	0
Unrealized Losses	(11)	(8)
Fair Value	9,138	8,341
Municipal obligations
Schedule of Available-for-sale Securities
Amortized Cost	6,865	7,309
Unrealized Gains	12	12
Unrealized Losses	0	0
Fair Value	$ 6,877	$ 7,321

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Available For Sale Gross Unrealized Loss Accumulated In Investments

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This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

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