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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventories

Inventories consisted of the following as of December 31:

 

(Dollars in thousands)   2020     2019  
Raw materials   $ 5,455     $ 5,608  
Finished goods     1,273       1,532  
Total inventories   $ 6,728     $ 7,140