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Note 6 - Property and Equipment
6 Months Ended
Jun. 30, 2017
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]
6.
   
PROPERTY AND EQUIPMENT
 
   
June 30, 2017
   
December 31, 2016
 
   
(In thousands)
 
Property and equipment
  $
40,209
    $
37,890
 
Accumulated depreciation
   
(28,071
)
   
(26,084
)
Property and equipment, net
  $
12,138
    $
11,806