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Inventories (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of composition of inventories The composition of inventories is as follows (dollar amounts in thousands):
March 31,
2021
December 31,
2020
Raw materials$14,075 $13,956 
Work in progress1,783 1,351 
Finished goods30,652 32,376 
Total inventories$46,510 $47,683