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Goodwill and Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
A summary of the activity impacting goodwill is presented below (in thousands):
Balance as of December 31, 2023
$416,821 
Adjustment
— 
Balance as of September 30, 2024
$416,821 
Schedule of Finite-Lived Intangible Assets The following table shows the cost, accumulated amortization and weighted average useful life in years for our acquired intangible assets as of September 30, 2024 (in thousands).
Weighted Average Useful Life (in years)
Gross Carrying ValueAccumulated AmortizationNet Carrying Value
Auto Injector technology platform7$402,000 $135,235 $266,765 
XYOSTED proprietary product10136,200 32,073 104,127 
Total finite-lived intangibles, net
$538,200 $167,308 $370,892 
ATRS-1902 (IPR&D)Indefinite48,700 
Total intangibles, net$419,592 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
Estimated future annual amortization of finite-lived intangible assets is shown in the following table (in thousands). 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.

YearAmortization Expense
Remainder of 2024$17,762 
202571,049 
202671,049 
202771,049 
202871,049 
Thereafter68,934 
Total$370,892