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Note 3 - Inventories (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

September 30,

  

December 31,

 
  

2020

  

2019

 
  

(Dollars in thousands)

 

Raw materials and purchased parts for assembly

 $19,585  $21,942 

Self-manufactured assembly parts and finished products

  14,799   13,007 

Total inventories

 $34,384  $34,949