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Note 3 - Inventories
 6 Months Ended
Jun. 30, 2017
Notes to Financial Statements  
Inventory Disclosure [Text Block]
NOTE
3
— INVENTORIES
 
Inventories consist of the following:
 
   
June 30,
    
December 31,
  
   
2017
   
2016
 
   
(Dollars in thousands)
  
Raw materials and purchased parts for assembly
   $
11,486
     $
5,429
  
Self-manufactured assembly parts and finished products
    
7,083
      
6,571
  
Total
   $
18,569
     $
12,000