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Note 11 - Other Assets
12 Months Ended
Dec. 31, 2017
Notes to Financial Statements  
Other Assets Disclosure [Text Block]
(
11
)        Other Assets
 
Other assets consist of the following (in thousands):
   
December 31,
 
   
2017
   
2016
 
Long term spare parts
  $
871
    $
830
 
Long term deposits
   
578
     
964
 
Other
   
129
     
0
 
Total   $
1,578
    $
1,794