Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Summary of Fair Value of Assets and Liabilities Measure on Recurring Basis (USD $) In Thousands, unless otherwise specified	Nov. 24, 2013	May 26, 2013
Fair Value, Inputs, Level 1 [Member]
Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Summary of Fair Value of Assets and Liabilities Measure on Recurring Basis [Line Items]
Marketable securities		$ 1,545
Total		1,545
Fair Value, Inputs, Level 2 [Member]
Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Summary of Fair Value of Assets and Liabilities Measure on Recurring Basis [Line Items]
Interest rate swap	95	163
Total	95	163
Fair Value, Inputs, Level 3 [Member]
Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Summary of Fair Value of Assets and Liabilities Measure on Recurring Basis [Line Items]
Investment in private company	37,300	29,600
Total	$ 37,300	$ 29,600