Goodwill and Other Intangibles (Tables)

6 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Goodwill consists of the following as of June 30, 2018:

	(in thousands)
Balance at December 31, 2017	$	23,844
Divestiture adjustment		(135	)
Effects of currency exchange		(107	)
Balance at June 30, 2018	$	23,602

Components of Identifiable Intangible Assets

Other intangible assets consist of the following:

	June 30, 2018						December 31, 2017
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
	(in thousands)
Product technology	$	10,197	$	5,295	$	4,902	$	10,267	$	4,908	$	5,359
Trademarks and licenses		1,943		1,511		432		1,948		1,468		480
Customer relationships		5,317		3,535		1,782		5,383		3,299		2,084
Other intangible assets		1,567		1,325		242		1,575		1,264		311
Total identifiable intangible assets	$	19,024	$	11,666	$	7,358	$	19,173	$	10,939	$	8,234

Amortization Expense Included in General and Administrative Expense

Amortization expense is included in general and administrative expense and was as follows for the periods indicated.

	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
	(in thousands)				(in thousands)
Amortization expense	$	414	$	456	$	832	$	910

We estimate that amortization expense for the remainder of 2018 and for each of the five succeeding fiscal years will be as follows:

	Year ended December 31,
	2018		2019		2020		2021		2022		2023
	(in thousands)
Amortization expense	$	750	$	1,377	$	1,122	$	923	$	713	$	680