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5. Property, Plant and Equipment (Tables)
6 Months Ended
Jun. 30, 2017
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment
(Dollars in thousands)  June 30, 2017   December 31, 2016 
     
Leasehold improvements  $39   $39 
Computers and related software   1,075    1,068 
Machinery and equipment   885    892 
Office furniture and fixtures   25    25 
    2,024    2,024 
Less: Accumulated depreciation   1,891    1,864 
   $133   $160