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Note 16 - Employee Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Expected Benefit Payments [Table Text Block]
(In thousands)
       
2019
  $
84
 
2020
   
84
 
2021
   
 
2022
   
 
2023
   
 
Beyond 2023
   
3,278
 
         
Total future payments
  $
3,446