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Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies (Details) - Allowance for Sales Returns and Doubtful Accounts (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
May 25, 2014
May 26, 2013
May 27, 2012
Allowance for Sales Returns and Doubtful Accounts [Abstract]      
Balance at beginning of period $ 583 $ 512 $ 342
Additions from acquisitions and adjustments charged to revenue and expenses 143 109 248
Write offs, net of recoveries (210) (38) (78)
Balance at end of period $ 516 $ 583 $ 512