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Inventories (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventories

Inventories consisted of the following:

 

(Dollars in thousands)   March 31, 2021     December 31, 2020  
Raw materials   $ 5,122     $ 5,455  
Finished goods     1,033       1,273  
Total inventories   $ 6,155     $ 6,728