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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Summary of Property, Plant and Equipment
                 
$ in thousands   2012     2011  

Land

  $ 75     $ 75  

Building and improvements

    2,350       2,326  

Machinery and equipment

    12,771       13,211  
      15,196       15,612  

Less accumulated depreciation

    (10,311     (9,961
   

 

 

   

 

 

 
    $ 4,885     $ 5,651