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Note 10 - Accumulated Other Comprehensive Loss (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Comprehensive Income (Loss) [Table Text Block]
   

Three Months Ended

   

Nine Months Ended

 
   

September 30,

   

September 30,

 

(in thousands)

 

2019

   

2018

   

2019

   

2018

 

Foreign currency translation adjustments

                               
Balance at beginning of period   $ (8,494 )   $ (6,359 )   $ (8,492 )   $ (5,234 )
Other comprehensive income (loss) before reclassifications     (2,150 )     (879 )     (2,152 )     (2,004 )

Amounts reclassified from accumulated other comprehensive loss

    -       -       -       -  

Net current-period other comprehensive income (loss)

    (2,150 )     (879 )     (2,152 )     (2,004 )

Balance at end of period

  $ (10,644 )   $ (7,238 )   $ (10,644 )   $ (7,238 )