Intangible assets and goodwill

6 Months Ended

Jun. 30, 2020

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 June 30, 2020

Balance at December 31, 2019

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

$

87,940

$

183,060

$

271,000

$

77,172

$

193,828

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

		Remainder of
		2020		2021		2022		2023		2024		Thereafter
Amortization expense	$	10,768	$	21,536	$	21,536	$	21,536	$	21,536	$	86,148

Goodwill

There were no changes to the carrying amount of goodwill for the six months ended June 30, 2020.