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Intangible Assets (Tables)
6 Months Ended
Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Intangible Assets
The following is a summary of the Company’s intangible assets as of June 30, 2019:
 
 
 
 
June 30, 2019
(in thousands)
Estimated
Useful Life
(Years)
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
HETLIOZ®
February 2035
 
$
33,000

 
$
9,217

 
$
23,783

The following is a summary of the Company’s intangible assets as of December 31, 2018:
 
 
 
 
December 31, 2018
(in thousands)
Estimated
Useful Life
(Years)
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
HETLIOZ®
February 2035
 
$
33,000

 
$
8,458

 
$
24,542


Summary of Future Intangible Asset Amortization a summary of the future intangible asset amortization schedule as of June 30, 2019:

(in thousands)
Total
 
2019
 
2020
 
2021
 
2022
 
2023
 
Thereafter
HETLIOZ®
$
23,783

 
$
759

 
$
1,518

 
$
1,518

 
$
1,518

 
$
1,518

 
$
16,952