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Note 3 - Inventories (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

March 31,

  

December 31,

 
  

2022

  

2021

 
  

(Dollars in thousands)

 

Raw materials and purchased parts for assembly

 $12,906  $11,539 

Self-manufactured assembly parts and finished products

  19,982   16,906 

Total inventories

 $32,888  $28,445