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Note 10 - Discontinued Operations (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 26, 2018
Aug. 27, 2017
Aug. 26, 2018
Aug. 27, 2017
Jul. 25, 2018
May 27, 2018
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member]            
Restructuring and Related Cost, Expected Cost Remaining           $ 1,020
Restructuring Charges, Total $ 117 $ 2,813 $ 169 $ 4,063    
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Facility Closing [Member]            
Restructuring Charges, Total $ 77 $ 89 $ 208 $ 200    
Electronics Business [Member] | Discontinued Operations, Held-for-sale [Member]            
Disposal Group, Including Discontinued Operation, Consideration         $ 145,000