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Marketable Securities - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Jan. 30, 2016	May. 02, 2015
Schedule of Available-for-sale Securities
Amortized Cost	$ 24,474	$ 25,349
Unrealized Gains	2	6
Unrealized Losses	(5)	(9)
Fair Value	24,471	25,346
Certificates of deposit
Schedule of Available-for-sale Securities
Amortized Cost	15,420	11,409
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	15,420	11,409
U.S. Government securities
Schedule of Available-for-sale Securities
Amortized Cost		1,000
Unrealized Gains		1
Unrealized Losses		0
Fair Value		1,001
U.S. Government sponsored entities
Schedule of Available-for-sale Securities
Amortized Cost	6,574	7,951
Unrealized Gains	0	0
Unrealized Losses	(5)	(9)
Fair Value	6,569	7,942
Municipal obligations
Schedule of Available-for-sale Securities
Amortized Cost	2,480	4,989
Unrealized Gains	2	5
Unrealized Losses	0	0
Fair Value	$ 2,482	$ 4,994

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-Publisher FASB
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-Section 50
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