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Note 17 - Accumulated Other Comprehensive Loss (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   

Unrealized Gains

(Losses) on

Available-for-Sale Securities

   

Foreign Currency Translation

Adjustments

   

Total

 

Balance as of January 1, 2018

  $ (1,364 )   $ 3,177     $ 1,813  

Other comprehensive loss before reclassifications

    (549 )     (7,082 )     (7,631 )

Amounts reclassified from accumulated other comprehensive income (loss)

    66       -       66  

Tax effect

    209       -       209  

Net current period other comprehensive loss

    (274 )     (7,082 )     (7,356 )

Balance as of December 31, 2018

    (1,638 )     (3,905 )     (5,543 )

Other comprehensive income (loss) before reclassifications

    1,977       (1,706 )     271  

Amounts reclassified from accumulated other comprehensive loss

    (1 )     -       (1 )

Tax effect

    (203 )     -       (203 )

Net current period other comprehensive income (loss)

    1,773       (1,706 )     67  

Balance as of December 31, 2019

  $ 135     $ (5,611 )   $ (5,476 )