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Property and Equipment (Tables)
 6 Months Ended
Jun. 30, 2017
Property and Equipment, Net and Depreciation and Amortization Expense Related to Property and Equipment

Property and equipment consist of the following (in thousands):

 

     Estimated Useful                
     Life (Years)      June 30, 2017      December 31, 2016  

Land

      —        $ 875      $ 875  

Buildings

      39-40        17,389        17,389  

Building improvements

      5-40        34,957        34,957  

Machinery and equipment

      3-15        62,992        62,992  

Furniture, fixtures and office equipment

      5-10        3,556        3,556  

Computer equipment and software

      3        8,531        8,531  

Construction in progress

      —          91        202  
     

 

 

     

 

 

  
        128,391        128,502  

Less accumulated depreciation

         (100,471 )       (99,575 ) 
     

 

 

     

 

 

  

Total property and equipment, net

       $ 27,920      $ 28,927  
     

 

 

     

 

 

  

Depreciation expense related to property and equipment for the three and six months ended June 30, 2017 and 2016 was as follows (in thousands):

 

     Three Months Ended June 30,      Six Months Ended June 30,  
     2017      2016      2017      2016  

Depreciation expense

    $ 450      $ 589      $ 896      $ 1,179