Intangible Assets

12 Months Ended

Dec. 31, 2014

Note 4. Intangible Assets

Amortization expense related to intangible assets was $1.1 million, $1.3 million, and $1.5 million for the years ended December 31, 2014, 2013 and 2012.

In December 2006, we acquired the use of a toll-free telephone number for cash consideration of $250,000. This asset has an indefinite useful life. The intangible asset is tested for impairment annually or more often if events or changes in circumstances indicate that the carrying value may not be recoverable.

The following table summarizes the components of intangible assets (in thousands):

	Non-compete			Partner Relationships			Customer Base			Technology Rights			Tradenames			Indefinite Life Intangibles		Total
As of December 31, 2014
Gross carrying value	$	593		$	145		$	641		$	5,330		$	760		$	250	$	7,719
Accumulated amortization		(527	)		(145	)		(453	)		(3,582	)		(649	)		—		(5,356	)
Net carrying value	$	66		$	—		$	188		$	1,748		$	111		$	250	$	2,363

As of December 31, 2013
Gross carrying value	$	593		$	145		$	641		$	5,330		$	760		$	250	$	7,719
Accumulated amortization		(477	)		(145	)		(361	)		(2,689	)		(593	)		—		(4,265	)
Net carrying value	$	116		$	—		$	280		$	2,641		$	167		$	250	$	3,454

The estimated future amortization expense of intangible assets, with the exception of the indefinite-life intangible assets as of December 31, 2014 is as follows (in thousands):

Fiscal Year	Amount
2015	$	1,069
2016		1,028
2017		16
Total	$	2,113

Weighted average remaining useful life	1.98 years