Intangible Assets, Net and Goodwill

6 Months Ended

Jun. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure [Text Block]

NOTE 3—INTANGIBLE ASSETS, NET

Intangible assets, net consisted of the following:

(in thousands)	June 30, 2021		December 31, 2020		June 30, 2020
Intangible assets subject to amortization:
Patents and purchased technology	$	14,198	$	14,198	14,198
Customer relationships	23,000		23,000		23,000
Gross carrying amount	37,198		37,198		37,198
Accumulated amortization:
Patents and purchased technology	(14,198)		(14,198)		(13,976)
Customer relationships	(18,188)		(17,363)		(16,538)
Accumulated amortization	(32,386)		(31,561)		(30,514)
Net carrying amount	4,812		5,637		6,684
Intangible assets not subject to amortization	97,921		97,921		115,421
Intangible assets, net	$	102,733	$	103,558	$	122,105

Amortization expense for intangible assets subject to amortization was $0.4 million and $0.7 million for the three months ended June 30, 2021 and 2020, respectively, and was $0.8 million and $1.5 million for the six months ended June 30, 2021, and 2020, respectively.

The following table presents the estimated annual amortization expense for the years ending 2021 through 2025:

(in thousands)
2021	$	1,650
2022	1,650
2023	1,650
2024	688
2025	—