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Note 15 - Accumulated Other Comprehensive Loss
 3 Months Ended
Mar. 31, 2021
Notes to Financial Statements  
Comprehensive Income (Loss) Note [Text Block]
15.
ACCUMULATED OTHER COMPREHENSIVE LOSS
 
The components of accumulated other comprehensive loss are as follows:
 
(in thousands)
  
As of March 31, 2021
    
As of December 31, 2020
  
Foreign currency translation adjustment
   $
(4,428
 )   $
(4,406
 )
Accumulated other comprehensive loss
   $
(4,428
 )   $
(4,406
 )