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Goodwill and Intangible Assets, Net
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets, Net Goodwill and Intangible Assets, Net
Goodwill
The following table sets forth the gross carrying amounts of goodwill (dollars in thousands):
December 31,
2024		December 31,
2023
Goodwill$117,019 $117,019 
There were no goodwill impairment charges recognized in 2024 or 2023.
Intangible Assets, Net
The following table sets forth the gross carrying amounts and related accumulated amortization of intangibles assets (dollars in thousands):
December 31, 2024December 31, 2023
Remaining Weighted
Average Life (Years)		Carrying Amount, GrossAccumulated AmortizationCarrying Amount, NetCarrying Amount, GrossAccumulated AmortizationCarrying Amount, Net
Acquired in-process research and development$124,000 $— $124,000 $124,000 $— $124,000 
Intangible assets subject to amortization:
Acquired developed technology and product rights5.92661,311 (263,399)397,912 661,311 (190,395)470,916 
Capitalized patent defense costs0.0043,820 (43,820)— 43,820 (38,847)4,973 
Total intangible assets5.92$829,131 $(307,219)$521,912 $829,131 $(229,242)$599,889 
Amortization expense for intangible assets was $78.0 million, $82.4 million, and $82.6 million for the years ended December 31, 2024, 2023, and 2022, respectively.
Patent defense costs are deferred legal fees incurred in conjunction with defending patents for Oxtellar XR and Trokendi XR. U.S. patents covering Trokendi XR and Oxtellar XR will expire no earlier than 2027. The Company entered into settlement agreements that allowed third parties to enter the Trokendi XR market on January 1, 2023. The Company entered into settlement and license agreements that allowed a third party to enter the Oxtellar XR market in September 2024.
The Company entered into settlement and license agreements that allows third parties to enter the XADAGO market in December 2027, or sooner under certain conditions.
In the fourth quarter of 2023, the Company recognized impairment charges of $20.2 million related to some of its acquired intangible assets, primarily XADAGO. The primary factors that led to the impairment determinations were the following: (1) the performance of the commercial products; (2) forthcoming loss of exclusivity of XADAGO; and (3) the change in the Company's future outlook of the brands. The Company recognized as impairment loss the difference between the estimated fair values and carrying values of these intangible assets. The Company used the discounted cash flow income approach to estimate the fair values of each of these intangible assets. The primary inputs and assumptions used in the model included timing and projections of estimated future revenues and cash flows, loss of exclusivity, and discount rate. The fair value measurement is classified as Level 3 within the fair value hierarchy as defined in ASC 820, Fair Value Measurement, due to the unobservable inputs used. The impairment loss is reported as Intangible asset impairment charges in the consolidated statements of earnings.
The following table sets forth the anticipated annual amortization expense for definite-lived intangible assets. Actual amortization expense to be reported in future periods could differ from these estimates as a result of acquisitions, divestitures, and
asset impairments, among other factors (dollars in thousands):
Year:Estimated Amortization Expense
2025$70,876 
202670,876 
202770,745 
202869,301 
202969,301 
Thereafter46,813