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Intangible Assets
 6 Months Ended
Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets

4. Intangible Assets

 

Intangible assets as of June 30, 2017 and December 31, 2016 consisted of the following:

 

    Estimated useful
lives		   June 30, 2017     December 31, 2016  
Tradename   5 to 7 years   $ 555     $ 555  
Patents and technological know-how   10 years     6,138       6,010  
Proprietary software   3 to 15 years     4,341       4,341  
Other   3 to 5 years     324       324  
Total intangible assets         11,358       11, 230  
Accumulated amortization         (6,021 )     (5,553 )
Total intangible assets, net       $ 5,337     $ 5,677  

 

The amortization of intangible assets for the three months ended June 30, 2017 and 2016 was as follows:

 

    Three month ended June 30,     Six month endedJune 30,  
    2017     2016     2017     2016  
Amortization of intangible assets   $ 231     $ 286     $ 468     $ 576  
                                 

 

The estimated future amortization expense of intangible assets is as follows:

 

Years ending December 31,      
2017 (remainder)   $ 462  
2018     900  
2019     785  
2020     606  
2021     606  
Thereafter     1,978  
    $ 5,337