Other Intangible Assets

9 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Other Intangible Assets

Other Intangible Assets

Other intangible assets are as follows (in thousands):

	September 30, 2020				December 31, 2019
	Cost (1)		Accumulated Amortization		Cost		Accumulated Amortization
Finite-lived intangible assets:
Patents and technology	$	—	$	—	$	17,493	$	6,715
Customer relationships	—		—		15,367		6,013
Trademarks and brand names	—		—		1,351		1,160
Total finite-lived intangible assets	$	—	$	—	$	34,211	$	13,888
Carrying value:
Other intangible assets, net	$	—			$	20,323

(1) During the three months ended September 30, 2020, the Company recorded impairment charges to patents of $4.8 million, customer lists of $6.6 million, and trademarks and brand names of $1.1 million. See Note 10 - Impairment of Fixed and Long-lived Assets.

Amortization of finite-lived intangible assets acquired totaled $0.3 million and $0.5 million and $0.9 million and $1.5 million for the three months and nine months ended September 30, 2020 and 2019, respectively.