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Note 8 - Property and Equipment (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
June 30, 2019
   
December 31, 2018
 
   
(In thousands)
 
Property and equipment
  $
47,086
    $
44,730
 
Accumulated depreciation
   
(33,214
)
   
(30,577
)
Property and equipment, net
  $
13,872
    $
14,153