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4. Inventories
3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Inventories

Inventories consist of the following at:

 

 (Dollars in thousands) March 31, 2017   December 31, 2016  
             
Finished goods $ 242   $ 244  
Work in process   100     143  
Raw materials   244     289  
Total $ 586   $ 676