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Goodwill and Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2023
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, 2022$409,049 
Measurement period adjustment (1)
7,772 
Balance as of June 30, 2023
$416,821 
(1) Refer to Note 3, Business Combination for further discussion on the measurement period adjustment.
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 June 30, 2023 (in thousands).
Weighted average useful life (in years)
Gross Carrying ValueAccumulated AmortizationNet Carrying Value
Auto injector technology platform7$402,000 $63,450 $338,550 
XYOSTED proprietary product10136,200 15,048 121,152 
TLANDO product rights102,900 320 2,580 
Total finite-lived intangibles, net$541,100 $78,818 $462,282 
ATRS-1902 (IPR&D)Indefinite48,700 
Total intangibles, net$510,982 
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 2023$35,669 
202471,339 
202571,339 
202671,339 
202771,339 
Thereafter141,257 
Total$462,282