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Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2016
Intangible Assets Tables  
Estimated future amortization expense of intangible assets

The following table outlines our estimated future amortization expense related to intangible assets held at December 31, 2016 (in thousands):

Years Ended December 31,   Amount
2017 $ 116 
2018   115 
2019   115 
2020   98 
2021   80 
Thereafter   194 
  $ 718