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Equipment and Leasehold Improvements (Tables)
 12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Components of Equipment and Leasehold Improvements

Equipment and leasehold improvements consist of the following:

 

     As of December 31,  
     2015      2014  

Machinery and equipment

    $ 14,562       $ 14,095   

Office equipment

      778         766   

Office furniture

      110         110   

Leasehold improvements

      4,789         4,760   

Construction in progress

      11         70   
  

 

 

     

 

 

  
     20,250         19,801   

Less: Accumulated depreciation and amortization

      (18,389 )       (17,663 ) 
  

 

 

     

 

 

  
   $ 1,861       $ 2,138