Intangible Assets, Net (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Summary Of Identifiable Intangible Assets

Intangible assets, net consisted of the following:

(in thousands)	March 31, 2020		December 31, 2019		March 31, 2019
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	(13,644)		(13,311)		(12,314)
Customer relationships	(16,125)		(15,713)		(14,475)
Total accumulated amortization	(29,769)		(29,024)		(26,789)
Net carrying amount	7,429		8,174		10,409
Intangible assets not subject to amortization	115,421		115,421		115,421
Intangible assets, net	$	122,850	$	123,595	$	125,830

Schedule of finite lived intangible assets future amortization expense

Annual amortization expense is estimated to be as follows for the years 2020 through 2024:

(in thousands)
2020	$	2,537
2021	1,650
2022	1,650
2023	1,650
2024	688