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Intangible Assets
9 Months Ended
Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
Intangible Assets

Intangible assets, net of amortization, consisted of intellectual property such as license agreements and totaled $1.1 million and $1.2 million as of September 30, 2016 and December 31, 2015, respectively. The terms of some of these license agreements provide for use of the licensed software into perpetuity while others are definite. The Company amortizes the cost of the license agreements over the estimated useful life, which can range between three to five years. Amortization expense related to intangible assets was approximately $183,000 and $150,000 for the nine months ended September 30, 2016 and 2015, respectively. As of September 30, 2016, intangible assets not yet placed into service totaled approximately $0.5 million.

The following table illustrates the estimated future amortization expense of intangible assets as of September 30, 2016 (in thousands):
Fiscal Year Ending December 31,
 
Estimated Amortization Expense
2016 - remainder of the year
 
$
82

2017
 
295

2018
 
234

2019
 
234

2020
 
136

Thereafter
 
86

Total
 
$
1,067