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Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Detail) - Summary of fair value of assets and liabilities measure on recurring basis: (USD $) In Thousands, unless otherwise specified	Aug. 26, 2012	May 27, 2012	Apr. 23, 2012
Investment in private company	$ 22,896	$ 21,500
Contingent consideration			(3,926)
Fair Value at August 26, 2012 [Member] | Fair Value, Inputs, Level 1 [Member]
Marketable securities	756
Total	756
Fair Value at August 26, 2012 [Member] | Fair Value, Inputs, Level 2 [Member]
Interest rate swap	305
Total	305
Fair Value at August 26, 2012 [Member] | Fair Value, Inputs, Level 3 [Member]
Investment in private company	22,896
Total	22,896
Contingent consideration	3,956
Total	3,956
Fair Value at May 27, 2012 [Member] | Fair Value, Inputs, Level 2 [Member]
Interest rate swap		347
Total		347
Fair Value at May 27, 2012 [Member] | Fair Value, Inputs, Level 3 [Member]
Investment in private company		21,500
Total		21,500
Contingent consideration		3,926
Total		$ 3,926

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