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Inventories (Tables)
12 Months Ended
Dec. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of Inventories

Inventories consisted of the following as of December 31:

 

           
(Dollars in thousands)  2022   2021 
Raw materials  $3,127   $4,768 
Finished goods   1,315    1,742 
Total inventories  $4,442   $6,510