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Note 7 - Property and Equipment (Tables)
9 Months Ended
Sep. 30, 2016
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
September 30, 2016
   
December 31, 2015
 
   
(In thousands)
 
Property and equipment
  $ 37,816     $ 34,591  
Accumulated depreciation
    (26,157 )     (23,466 )
Property and equipment, net
  $ 11,659     $ 11,125