Intangible Assets

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

Intangible assets, substantially all of which were acquired in the acquisition of TIW and OPT, consist of the following:

	Estimated Useful Lives	March 31, 2018
		Gross Book Value		Accumulated Amortization			Foreign Currency Translation		Net Book Value
		(In thousands)
Trademarks	indefinite	$	8,416	$	—		$	62	$	8,478
Patents	15 - 30 years	5,946		(1,049		)	11		4,908
Customer relationships	5 - 15 years	26,503		(2,465		)	368		24,406
Non-compete agreements	3 years	171		(71		)	—		100
		$	41,036	$	(3,585	)	$	441	$	37,892

	Estimated Useful Lives	December 31, 2017
		Gross Book Value		Accumulated Amortization			Foreign Currency Translation			Net Book Value
		(In thousands)
Trademarks	indefinite	$	8,416	$	—		$	56		$	8,472
Patents	15 - 30 years	5,946		(968		)	80			5,058
Customer relationships	5 - 15 years	26,503		(1,675		)	(64		)	24,764
Non-compete agreements	3 years	171		(57		)	—			114
		$	41,036	$	(2,700	)	$	72		$	38,408

Amortization expense for each of the three months ended March 31, 2018 and 2017 was $0.7 million.