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Note 8 - Accumulated Other Comprehensive Income (Tables)
9 Months Ended
Sep. 27, 2014
Disclosure Text Block [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   

Accumulated other comprehensive income

 
   

Three months ended

   

Nine months ended

 
   

Sep 27, 2014

   

Sep 28, 2013

   

Sep 27, 2014

   

Sep 28, 2013

 
                                 

Beginning balance

  $ -     $ 1,964     $ 1,647     $ 2,052  

Other comprehensive income before reclassifications

    -       (55 )     81       1,305  

Amounts reclassified from accumulated other comprehensive income

                               

Net Unrealized Gain(Loss) on Marketable Securities *

    -       (25 )     (1,728 )     (1,476 )

Foreign Currency Translation

    -       -       -       3  

Net current period other comprehensive income

    -       (80 )     (1,647 )     (168 )

Ending balance

  $ -     $ 1,884     $ -     $ 1,884