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Note 7 - Property and Equipment
3 Months Ended
Mar. 31, 2018
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]
7.
PROPERTY AND EQUIPMENT
 
   
March 31,
2018
   
December 31,
2017
 
   
(In thousands)
 
Property and equipment
  $
41,403
    $
40,206
 
Accumulated depreciation
   
(28,947
)
   
(27,847
)
Property and equipment, net
  $
12,456
    $
12,359