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Note 12 - Segment Data (Details) - Financial Information From Reportable Segments - Balance Sheet (USD $)
In Thousands, unless otherwise specified
Sep. 28, 2014
Dec. 31, 2013
Total assets:    
Assets $ 167,837 $ 146,283
Industrial Group [Member]
   
Total assets:    
Assets 119,396 100,593
Electronics Group [Member]
   
Total assets:    
Assets 30,509 29,689
General, Corporate and Other [Member]
   
Total assets:    
Assets $ 17,932 $ 16,001