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Intangible Assets and Goodwill (Tables)
12 Months Ended
Dec. 31, 2019
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 December 31, 2019

Balance at December 31, 2018

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

$

77,172

$

193,828

$

271,000

$

55,636

$

215,364

Schedule of estimated aggregate amortization expense Estimated aggregate amortization expense based on the current carrying value of amortizable intangible assets will be as follows for the years ending December 31 (in thousands):

2020

2021

2022

2023

2024

Thereafter

Amortization expense

$

21,536

$

21,536

$

21,536

$

21,536

$

21,536

$

86,148