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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 $ 25,796 $ 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 25,796    
Total 25,796    
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