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Note 5 - Accumulated Other Comprehensive Income (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Three Months Ended
 
   
March 31,
 
   
2019
   
2018
 
   
(Dollars in thousands)
 
Beginning balance
1
  $
-
    $
3,992
 
Adoption of accounting standards
   
-
     
(3,992
)
Ending balance
  $
-
    $
-