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Inventories
12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Inventories

6. Inventories

 

Inventories consisted of the following as of December 31:

 

(Dollars in thousands)  2021   2020 
Raw materials  $4,768   $5,455 
Finished goods   1,742    1,273 
Total inventories  $6,510   $6,728