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Note 11 - Segment Data (Details) - Financial Information From Reportable Segments - Balance Sheet (USD $)
In Thousands, unless otherwise specified
Mar. 30, 2014
Dec. 31, 2013
Total assets:    
Assets $ 164,813 $ 146,283
Industrial Group [Member]
   
Total assets:    
Assets 120,165 100,593
Electronics Group [Member]
   
Total assets:    
Assets 30,579 29,689
General, Corporate and Other [Member]
   
Total assets:    
Assets $ 14,069 $ 16,001