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Note 10 - Segment Data (Tables)
9 Months Ended
Sep. 29, 2013
Income Statement [Member]
 
Note 10 - Segment Data (Tables) [Line Items]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   

Three Months Ended

   

Nine Months Ended

 
   

September 29,

2013

   

September 30,

2012

   

September 29,

2013

   

September 30,

2012

 
   

(Unaudited)

   

(Unaudited)

 

Net revenue from unaffiliated customers:

                               

Industrial Group

  $ 66,650     $ 65,176     $ 212,231     $ 230,548  

Electronics Group

    9,628       13,587       24,624       43,590  
    $ 76,278     $ 78,763     $ 236,855     $ 274,138  

Gross profit (loss):

                               

Industrial Group

  $ 7,417     $ 6,574     $ 24,385     $ 25,402  

Electronics Group

    (156 )     2,800       (712 )     9,709  
    $ 7,261     $ 9,374     $ 23,673     $ 35,111  

Operating income (loss):

                               

Industrial Group

  $ 4,628     $ 3,801     $ 15,989     $ 17,254  

Electronics Group

    (3,521 )     (947 )     (18,116 )     (487 )

General, corporate and other

    (2,082 )     (2,219 )     (6,418 )     (7,161 )
    $ (975 )   $ 635     $ (8,545 )   $ 9,606  
Balance Sheet [Member]
 
Note 10 - Segment Data (Tables) [Line Items]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   

September 29,

2013

   

December 31,

2012

 
   

(Unaudited)

         

Total assets:

               

Industrial Group

  $ 114,789     $ 114,268  

Electronics Group

    31,235       38,852  

General corporate and other

    2,894       7,848  
    $ 148,918     $ 160,968