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Note 12 - Segment Data (Tables)
6 Months Ended
Jun. 29, 2014
Income Statement [Member]
 
Note 12 - Segment Data (Tables) [Line Items]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   

Three Months Ended

   

Six Months Ended

 
   

June 29,

   

June 30,

   

June 29,

   

June 30,

 
   

2014

   

2013

   

2014

   

2013

 
   

(Unaudited)

   

(Unaudited)

 

Net revenue from unaffiliated customers:

                               

Industrial Group

  $ 83,710     $ 74,432     $ 159,549     $ 145,581  

Electronics Group

    9,403       7,734       17,808       14,996  
    $ 93,113     $ 82,166     $ 177,357     $ 160,577  

Gross profit (loss):

                               

Industrial Group

  $ 11,383     $ 8,858     $ 22,537     $ 16,968  

Electronics Group

    (556

)

    (522

)

    (1,146

)

    (556

)

    $ 10,827     $ 8,336     $ 21,391     $ 16,412  

Operating income (loss):

                               

Industrial Group

  $ 7,040     $ 5,976     $ 15,153     $ 11,361  

Electronics Group

    (3,168

)

    (4,444

)

    (6,245

)

    (14,595

)

General, corporate and other

    (2,196

)

    (2,221

)

    (4,811

)

    (4,336

)

    $ 1,676     $ (689

)

  $ 4,097     $ (7,570

)

Balance Sheet [Member]
 
Note 12 - Segment Data (Tables) [Line Items]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   

June 29,

   

December 31,

 
   

2014

   

2013

 
   

(Unaudited)

         

Total assets:

               

Industrial Group

  $ 127,746     $ 100,593  

Electronics Group

    31,159       29,689  

General, corporate and other

    10,967       16,001  
    $ 169,872     $ 146,283