Intangible Assets

6 Months Ended

Jun. 30, 2022

Intangible Assets, Net (Excluding Goodwill) [Abstract]

10. INTANGIBLE ASSETS

Intangible assets consisted of the following:


	As of June 30, 2022							As of December 31, 2021
(In thousands)	Gross Carrying Amount		Accumulated Amortization			Net Book Value		Gross Carrying Amount		Accumulated Amortization			Net Book Value
Customer relationships	$	20,451	$	(10,415	)	$	10,036	$	20,796	$	(9,906	)	$	10,890
Developed technology		8,200		(4,251	)		3,949		8,200		(3,683	)		4,517
Licensed technology		5,900		(2,813	)		3,087		5,900		(2,486	)		3,414
Licensing agreements		560		(262	)		298		560		(225	)		335
Patents		500		(397	)		103		500		(363	)		137
Trade names		210		(210	)		—		210		(210	)		—
Total	$	35,821	$	(18,348	)	$	17,473	$	36,166	$	(16,873	)	$	19,293

The Company evaluates the carrying value of intangible assets whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable and the undiscounted cash flows estimated to be generated by the asset are less than the asset’s carrying value. Due to the current economic environment, particularly related to COVID-19, the Company assessed impairment triggers related to intangible assets during the first and second quarters of 2022 and 2021. As a result, no quantitative impairment test of long-lived assets was performed as of June 30, 2022 and 2021, and no impairment losses of intangible assets were recorded during the three and six months ended June 30, 2022 and 2021.

Amortization expense was $0.9 million and $1.0 million in the three months ended June 30, 2022 and 2021 and $1.8 million and $2.1 million in the six months ended June 30, 2022 and 2021, respectively, and was included in cost of revenue, selling, general and administrative expenses and research and development expenses in the Condensed Consolidated Statements of Income.

Estimated future amortization expense of intangible assets was as follows:


	As of
(In thousands)	June 30, 2022
2022	$	1,696
2023		3,305
2024		3,213
2025		3,019
2026		1,985
Thereafter		4,255
Total	$	17,473