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Intangibles (Tables)
12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Amortization of Intangible Assets Acquired

Amortization of intangible assets acquired is calculated using the straight-line method over the estimated useful lives of the assets.

 

     Estimated Life
(years)
     December 31, 2015     December 31, 2014  

Capitalized patent costs

     17-20       $ 6,779      $ 6,183   

Intangible assets acquired:

       

Purchased patents and intellectual property

     3-10         250        250   

Existing technology

     5         1,560        1,560   

Customer relationships

     7         290        290   

Backlog

     2         760        760   

Tradenames

     3         290        290   

Non-solicitation agreements

     1         120        120   
     

 

 

   

 

 

 

Gross intangible assets

        10,049        9,453   

Accumulated amortization

        (3,436     (2,733
     

 

 

   

 

 

 

Intangible assets, net

      $ 6,613      $ 6,720   
     

 

 

   

 

 

 

 

Estimated Future Aggregate Amortization Expense

The aggregate amortization expense recorded in the years ended December 31, 2015, 2014 and 2013 was $722, $1,047 and $1,196, respectively. For intangible assets recorded at December 31, 2015, the estimated future aggregate amortization expense for the years ending December 31, 2016 through 2020 is approximately as follows:

 

Year ending December 31:

   Amortization
Expense
 

2016

   $ 613   

2017

     576   

2018

     278   

2019

     274   

2020

     213