Intangible assets and goodwill (Tables)

3 Months Ended

Mar. 31, 2020

Intangible assets and goodwill

Schedule of finite-lived intangible assets, net

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

Balance at March 31, 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

$

82,556

$

188,444

$

271,000

$

77,172

$

193,828

Schedule of estimated aggregate amortization expense

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	$	16,152	$	21,536	$	21,536	$	21,536	$	21,536	$	86,148