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Note 2 - Acquisition of Business (Tables)
6 Months Ended
Jun. 27, 2015
Notes Tables  
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
SymCom final purchase price allocation (in thousands):
 
Cash
  $ 325  
Current assets, net
    9,154  
Property, plant and equipment
    11,193  
Goodwill
    15,018  
Trademarks
    17,020  
Patents
    1,500  
Other non-current assets
    20  
Current liabilities
    (1,137 )
    $ 53,093