Intangible Assets and Goodwill

3 Months Ended

Mar. 31, 2021

Intangible Assets and Goodwill

Intangible Assets and Goodwill

8.    Intangible assets and goodwill

Intangible Assets, Net

The components of intangible assets were as follows (in thousands, except for useful life):

Balance at March 31, 2021

Balance at December 31, 2020

Weighted-

Gross

Net

Gross

Net

Average Useful

Carrying

Accumulated

Carrying

Carrying

Accumulated

Carrying

Lives (Years)

Amount

Amortization

Amount

Amount

Amortization

Amount

Finite-lived intangible assets:

Licensed IP

12.5

$

271,000

$

104,093

$

166,907

$

271,000

$

98,709

$

172,291

Estimated aggregate amortization expense based on the current carrying value of amortizable intangible assets is as follows (in thousands):

		Remainder of
		2021		2022		2023		2024		2025		Thereafter
Amortization expense	$	16,155	$	21,536	$	21,536	$	21,536	$	21,536	$	64,608

Goodwill

There were no changes to the carrying amount of goodwill for the three months ended March 31, 2021.