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Note 12 - Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
(In thousands)
  
As of December 31,
  
   
2019
    
2018
  
Foreign currency translation adjustment
   $
(4,371
)
   $
(4,396
)
Accumulated other comprehensive loss
   $
(4,371
)
   $
(4,396
)