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4. Inventories
6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Inventories

Inventories consist of the following at:

 

(Dollars in thousands)  June 30, 2017   December 31, 2016 
         
Finished goods  $237   $244 
Work in process   120    143 
Raw materials   340    289 
Total  $697   $676