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Inventories (Tables)
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of composition of inventories
The composition of inventories is as follows (dollar amounts in thousands):
 
March 31,
2020
December 31,
2019
Raw materials$13,245  $13,329  
Work in progress1,269  1,426  
Finished goods30,840  31,911  
Total inventories$45,354  $46,666