Intangible Assets

12 Months Ended

Dec. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets

9. Intangible Assets

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

	Estimated Useful Lives	2020
		Gross Book Value		Accumulated Amortization			Foreign Currency Translation			Net Book Value
	(In thousands)
Trademarks	15 years	$	8,238	$	(1,033	)	$	(5	)	$	7,200
Patents	15 - 30 years		6,054		(2,715	)		(2	)		3,337
Customer relationships	5 - 15 years		25,966		(7,304	)		65			18,727
Non-compete agreements	3 years		171		(171	)		-			-
Organizational Costs	indefinite		179		(15	)		6			170
		$	40,608	$	(11,238	)	$	64		$	29,434

	Estimated Useful Lives	2019
		Gross Book Value		Accumulated Amortization			Foreign Currency Translation		Net Book Value
		(In thousands)
Trademarks	15 years	$	8,159	$	(512	)	$	47	$	7,694
Patents	15 - 30 years		5,945		(2,529	)		-		3,416
Customer relationships	5 - 15 years		25,787		(4,954	)		122		20,955
Non-compete agreements	3 years		171		(170	)		-		1
Organizational costs	indefinite		172		-			7		179
		$	40,234	$	(8,165	)	$	176	$	32,245

Amortization expense was $3.0 million, $2.9 million, $2.4 million, respectively for each of the years 2020, 2019 and 2018. Based on the carrying value of intangible assets at December 31, 2020, amortization expense for the subsequent five years is estimated to be as follows: 2021 — $3.1 million; 2022 — $2.8 million; 2023 — $2.8 million ; 2024 — $2.8 million; and 2025 — $2.8 million.