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Property and Equipment
9 Months Ended
Sep. 30, 2016
Property, Plant and Equipment [Abstract]  
Property and Equipment

4. PROPERTY AND EQUIPMENT

Property and equipment consisted of the following:

 

     September 30,      December 31,  
     2016      2015  

Office equipment

   $ 539       $ 539   

Laboratory equipment

     4,442         4,337   

Leasehold improvements

     7,683         7,683   

Construction in progress

     759         547   

Software

     96         96   
  

 

 

    

 

 

 

Total property and equipment

     13,519         13,202   

Less: accumulated depreciation

     (9,256      (7,989
  

 

 

    

 

 

 

Property and equipment, net

   $ 4,263       $ 5,213   
  

 

 

    

 

 

 

Depreciation expense related to property and equipment amounted to $404 and $414 for the three months ended September 30, 2016 and 2015, respectively, and $1,267 and $1,182 for the nine months ended September 30, 2016 and 2015, respectively.