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Property, Plant and Equipment (Tables)
6 Months Ended
Jun. 30, 2021
Property, Plant and Equipment [Abstract]  
Property, plant and equipment consist of the following at:

Property, plant and equipment consist of the following at:

(Dollars in thousands)  June 30, 2021   December 31, 2020 
     
Land  $52   $ 
Leasehold improvements   262    262 
Computers and related software   2,639    1,603 
Machinery and equipment   902    885 
Office furniture and fixtures   39    38 
Construction in progress   437     
    4,331    2,788 
Less: Accumulated depreciation   2,199    1,941 
   $2,132   $847