3.    Goodwill and Intangible Assets

Changes to goodwill during the year ended December 31, 2015 and 2014 were as follows (in thousands):

 

		Total
Balance – December 31, 2013		$	11,152
Translation adjustment			(649	)
Balance – December 31, 2014			10,503
Translation adjustment			(493	)
Balance – December 31, 2015		$	10,010

Intangible assets consist of the following at December 31, 2015 and December 31, 2014 (in thousands):

 

		Trademark				Developed Technology				Customer Relationships				Total
Gross carrying amount – December 31, 2015		$	300			$	1,370			$	1,240			$	2,910
Translation adjustment			(19	)			(83	)			(76	)			(178	)
Accumulated amortization			(215	)			(538	)			(381	)			(1,134	)
Balance – December 31, 2015		$	66			$	749			$	783			$	1,598

 

		Trademark				Developed Technology				Customer Relationships				Total
Gross carrying amount – December 31, 2014		$	300			$	1,370			$	1,240			$	2,910
Translation adjustment			(5	)			(20	)			(18	)			(43	)
Accumulated amortization			(127	)			(333	)			(225	)			(685	)
Balance – December 31, 2014		$	168			$	1,017			$	997			$	2,182

Amortization expense related to the developed technology is classified as a component of cost of service revenues in the consolidated statements of operations. Amortization expense related to trademark and customer relationships is classified as a component of general and administrative expenses in the consolidated statements of operations.

Acquired intangible assets are amortized over their estimated useful lives based on either the pattern in which the economic benefits of the intangible asset are consumed or on a straight-line method. The estimated useful life represents the anticipated term of the acquired intangible assets. The estimated useful lives for the trademark, developed technology and customer relationships are 3 years, 7 years and 7 years, respectively. The weighted average amortization period in total is 6.6 years.

Amortization expense for the years ended December 31, 2015 and 2014, was $0.4 million and $0.7 million, respectively. As of December 31, 2015, amortization expense on existing intangible assets for the next five years and beyond is as follows (in thousands):

 

Year		Total
2016		$	436
2017			346
2018			317
2019			287
2020			212
Total		$	1,598