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Note 21 - Employee Benefit Plan (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Expected Benefit Payments [Table Text Block]
   
(Dollars in
thousands)
 
Year ending December 31
:
 
 
 
 
2019
  $
3,677
 
2020
   
1,183
 
2021
   
1,470
 
2022
   
2,032
 
2023
   
1,246
 
2024-2028    
4,262
 
Total
 
$
13,870