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Note 7 - Restructuring Charges (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Nov. 27, 2016
Nov. 29, 2015
May 31, 2015
Nov. 27, 2016
Nov. 29, 2015
Feb. 29, 2004
Proceeds from Sale of Property, Plant, and Equipment       $ 2,026,000  
Nelco Technology Zhuhai FTZ Ltd [Member]            
Proceeds from Sale of Property, Plant, and Equipment     $ 2,026,000      
Business Exit Costs $ 0 $ 8,000   0 83,000  
New England Laminates Co Inc [Member]            
Business Exit Costs $ 113,000 $ 150,000   $ 206,000 $ 290,000  
Real Estate Held-for-sale           $ 0