Intangible Assets

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets consisted of the following (in thousands):



	December 31,
	2017			2016			Estimated Useful Life
Customer relationships	$	4,335		$	4,335		5 Years
Affiliate network	994			994			12 Years
Trademarks	548			548			8 Years
	5,877			5,877
Accumulated amortization	(5,251		)	(4,568		)
Intangible assets, net	$	626		$	1,309

The Company assesses the impairment of purchased intangible assets subject to amortization when events and circumstances indicate that the carrying value of the assets might not be recoverable. The Company performed its evaluation of intangible assets as of September 30, 2017 and determined that the fair value of the long-lived assets exceeded the carrying value, therefore no impairment charges were required for the year ended December 31, 2017.

Intangible assets with finite lives are amortized using the straight-line method over the estimated economic lives of the assets, which range from five years to twelve years in accordance with ASC Topic 350. Accumulated amortization as of December 31, 2017 consisted of $4,335,000 for customer relationships, $528,000 for affiliate network and $388,000 for trademarks. Related amortization expense was $683,000 and $869,000 for the years ended December 31, 2017 and 2016, respectively. Amortization expense for each of the next five succeeding years will be as follows (in thousands):



2018	$	127
2019	127
2020	113
2021	69
2022	69
Thereafter	121
Total	$	626