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Note 12 - Accumulated Other Comprehensive Income (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Balance as of December 31, 2018

  $  

Foreign currency translation adjustment

    384  

Balance at March 31, 2019

  $ 384  

Foreign currency translation adjustment

    (505 )

Balance at June 30, 2019

  $ (121 )