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Intangible Assets and Goodwill (Tables)
 12 Months Ended
Dec. 31, 2018
Intangible Assets and Goodwill  
Schedule of intangible assets, net

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at December 31, 2018

 

Balance at December 31, 2017

 

 

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

 

$

55,636

 

$

215,364

 

$

271,000

 

$

34,099

 

$

236,901

 

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):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2019

 

 

2020

 

 

2021

 

 

2022

 

 

2023

 

 

Thereafter

Amortization expense

$

21,536

 

$

21,536

 

$

21,536

 

$

21,536

 

$

21,536

 

$

107,684