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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of composition of inventories
The composition of inventories is as follows (dollar amounts in thousands):
 
June 30,
2020
December 31,
2019
Raw materials$14,697  $13,329  
Work in progress1,288  1,426  
Finished goods34,181  31,911  
Total inventories$50,166  $46,666