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Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Revenue Arrangements (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
May 29, 2016
Feb. 28, 2016
Nov. 29, 2015
Aug. 30, 2015
May 31, 2015
Mar. 01, 2015
Nov. 30, 2014
Aug. 31, 2014
May 25, 2014
Feb. 23, 2014
Nov. 24, 2013
Aug. 25, 2013
May 29, 2016
May 31, 2015
May 25, 2014
Revenue Recorded Upon Shipment [Member]                              
Revenue                         $ 458,985 $ 465,484 $ 398,938
Revenue Recorded Upon Acceptance in Foreign Port [Member]                              
Revenue                         64,181 67,714 69,710
Revenue from Multiple Element Arrangements [Member]                              
Revenue                         13,400 4,253 6,811
Revenue from License Fees, R&D Contracts and Royalties/Profit Sharing [Member]                              
Revenue                         4,533 1,806 1,354
Revenue $ 135,313 $ 129,990 $ 140,441 $ 135,355 $ 134,448 $ 138,530 $ 132,665 $ 133,614 $ 120,929 $ 126,379 $ 120,026 $ 109,479 $ 541,099 $ 539,257 $ 476,813