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

Property and equipment consists of the following:

 

     As of December 31,  
     2015      2014  
     (in thousands)  

Computers and equipment

    $ 2,560       $ 2,399   

Machinery and equipment

      8,264         7,278   

Building and leasehold improvements

      6,143         5,721   
  

 

 

     

 

 

  

Gross property and equipment

      16,967         15,398   

Less accumulated depreciation

      (9,945 )       (8,520 ) 
  

 

 

     

 

 

  

Property and equipment, net

    $ 7,022       $ 6,878   
  

 

 

     

 

 

  
Depreciation Expense

Depreciation expense is as follows:

 

     Year ended December 31,  
     2015      2014      2013  
            (in thousands)         

Depreciation expense

    $ 1,881       $ 1,795       $ 1,573