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Note 8 - Property and Equipment (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
September 30,
2019
   
December 31,
2018
 
   
(In thousands)
 
Property and equipment at cost
  $
48,245
    $
44,730
 
Accumulated depreciation
   
(34,549
)
   
(30,577
)
Property and equipment, net
  $
13,696
    $
14,153