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CAPITALIZED FEES PAID (Tables)
12 Months Ended
Dec. 31, 2023
Capitalized Contract Cost [Abstract]  
Schedule of Capitalized Fees Paid

Capitalized fees paid, which consist of registrational and launch-related milestone fees paid to GSK, were as follows:

 

 

 

 

 

December 31,

 

(In thousands)

 

Amortization period

 

2023

 

 

2022

 

United States

 

2013-2030

 

$

120,000

 

 

$

120,000

 

Europe

 

2013-2029

 

 

60,000

 

 

 

60,000

 

Japan

 

2013-2029

 

 

40,000

 

 

 

40,000

 

Gross carrying value

 

 

 

 

220,000

 

 

 

220,000

 

Accumulated amortization

 

 

 

 

(136,216

)

 

 

(122,393

)

Net carrying value

 

 

 

$

83,784

 

 

$

97,607