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Note 10 - Segment Data (Details) - Financial Information from Reportable Segments (USD $)
In Thousands, unless otherwise specified
Sep. 29, 2013
Dec. 31, 2012
Total assets:    
Total assets $ 148,918 $ 160,968
Industrial Group [Member]
   
Total assets:    
Total assets 114,789 114,268
Electronics Group [Member]
   
Total assets:    
Total assets 31,235 38,852
General, Corporate and Other [Member]
   
Total assets:    
Total assets $ 2,894 $ 7,848