Intangible Assets and Goodwill

12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets and Goodwill

Note 9. Intangible Assets and Goodwill

Intangible Assets, Net

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

		Balance at December 31, 2024						Balance at December 31, 2023
	Weighted- Average Useful Lives (Years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Finite-lived intangible assets:
Licensed IP	12.5	$	271,000	$	184,854	$	86,146	$	271,000	$	163,318	$	107,682
Capitalized milestone payments	11.9	$	29,500	$	2,820	$	26,680	$	17,000	$	1,137	$	15,863
Other	2.0	$	1,400	$	423	$	977	$	—	$	—	$	—

Amortization expense for the years ended December 31, 2024, 2023 and 2022, was $23.6 million, $22.5 million, and $21.5 million, respectively, and is recorded in cost of product revenues on the consolidated statement of operations. 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):

	2025		2026		2027		2028		2029		Thereafter
Amortization expense	$	24,767	$	24,359	$	24,067	$	24,067	$	2,531	$	14,012

Goodwill

There were no changes to the carrying amount of goodwill for the years ended December 31, 2024 and 2023.