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Note 15 - Capitalized Interest (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Interest Costs Capitalized [Table Text Block]
   
For the Years Ended December 31,
 
(In thousands)
 
2017
   
2016
   
2015
 
Interest cost incurred
  $
521
    $
492
    $
496
 
Interest cost capitalized - property and equipment
   
(21
)
   
(25
)
   
(55
)
Interest expense, net
  $
500
    $
467
    $
441