Intangible Assets

12 Months Ended

Dec. 31, 2021

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	2021
		Gross Book Value		Accumulated Amortization			Foreign Currency Translation			Net Book Value
	(In thousands)
Trademarks	15 years	$	8,257	$	(1,579	)	$	(23	)	$	6,655
Patents	15 - 30 years		6,058		(3,285	)		(1	)		2,772
Customer relationships	5 - 15 years		26,078		(9,128	)		(38	)		16,912
Organizational Costs	3 years		185		(76	)		(2	)		107
		$	40,578	$	(14,068	)	$	(64	)	$	26,446

	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
Organizational costs	indefinite		179		(15	)		6			170
		$	40,437	$	(11,067	)	$	64		$	29,434

Amortization expense was $3.0 million, $3.0 million, $2.9 million, respectively for each of the years 2021, 2020 and 2019. Based on the carrying value of intangible assets at December 31, 2021, amortization expense for the subsequent five years is estimated to be as follows: 2022 — $2.8 million; 2023 — $2.8 million; 2024 — $2.8 million ; 2025 — $2.8 million; and 2026 — $2.8 million.