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Note 9 - Accumulated Other Comprehensive Income (Tables)
3 Months Ended
Mar. 31, 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