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Note 9 - Accumulated Other Comprehensive Income (Tables)
6 Months Ended
Jun. 30, 2014
Disclosure Text Block [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   

Unrealized Losses on Auction-Rate Securities

   

Unrealized Gains on Other Available-for-Sale Securities

   

Foreign Currency Translation Adjustments

   

Total

 

Balance as of January 1, 2014

  $ (360 )   $ 4     $ 6,616     $ 6,260  

Other comprehensive income (loss) before reclassifications

    (17 )     5       (596 )     (608 )

Amounts reclassified from accumulated other comprehensive income

    -       -       -       -  

Net current period other comprehensive income (loss)

    (17 )     5       (596 )     (608 )

Balance as of March 31, 2014

    (377 )     9       6,020       5,652  

Other comprehensive income before reclassifications

    5       8       176       189  

Amounts reclassified from accumulated other comprehensive income

    -       (1 )     -       (1 )

Net current period other comprehensive income

    5       7       176       188  

Balance as of June 30, 2014

  $ (372 )   $ 16     $ 6,196     $ 5,840