Intangible Assets

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

Identifiable intangible assets are as follows (in thousands):

		December 31, 2013
	Estimated Useful  Life	Gross		Accumulated Amortization		Net
Technology-based intangible assets	N/A	$	—	$	—	$	—
Total intangible assets		$	—	$	—	$	—

		December 31, 2014
	Estimated Useful  Life	Gross		Accumulated Amortization		Net
Technology-based intangible assets	Not yet determined	$	2,680	$	—	$	2,680
Total intangible assets		$	2,680	$	—	$	2,680

Technology-based intangible assets include software to be sold, leased or otherwise marketed. The estimated useful life and projected date that the intangible assets will be generally available for release to customers is not readily determinable as of December 31, 2014. Intangible assets have not been allocated to reporting segments as they are used across the operating segments.

Amortization expense related to intangible assets totaled $0.8 million, $0.0 million and $0.0 million for the years ended December 31, 2012, 2013 and 2014, respectively. Amortization expense for the year ended December 31, 2012 is included in the corporate segment.