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Intangible Assets
3 Months Ended
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
Intangible Assets

Intangible assets, net of amortization totaled $1.3 million and $1.4 million as of March 31, 2015 and December 31, 2014, respectively and consist of intellectual property purchased during the years ended December 31, 2014 and 2013. A portion of these assets, approximating $0.4 million, which represents software license agreements, was placed into service as of March 31, 2015. Amortization of intangible assets was $0.03 million for the three months ended March 31, 2015. There was no amortization recorded for the three months ended March 31, 2014. The terms of the some of these license agreements provide for use of the licensed software into perpetuity while others are more definite. The Company amortizes the cost of the license agreements over their estimated useful lives, which range from three to five years. The Company recorded an impairment charge of $0.1 million during the three months ended March 31, 2014 on one of the software licenses placed into service. The Company did not record any impairment charges related to intangible assets during the three months ended March 31, 2015. As of March 31, 2015, intangible assets not yet placed into service totaled approximately $1.1 million, and management anticipates these assets will be placed in service during the quarter ending June 30, 2015.

The following table illustrates the estimated future amortization expense of intangible assets as of March 31, 2015 (in thousands):

Fiscal Years
Estimated Amortization Expense
2016
$
139

2017
328

2018
280

2019
214

2020
214

Thereafter
161

Total
$
1,336