Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation of Revenue [Line Items]
Revenues	$ 389,913	$ 384,014	$ 1,155,426	$ 1,134,823
Product revenue, net
Disaggregation of Revenue [Line Items]
Revenues	378,367	376,687	1,125,149	1,118,152
License and royalty revenues
Disaggregation of Revenue [Line Items]
Revenues	11,546	7,327	30,277	16,671
Total oncology
Disaggregation of Revenue [Line Items]
Revenues	238,930	240,616	720,220	748,912
PYLARIFY
Disaggregation of Revenue [Line Items]
Revenues	238,930	240,616	720,220	748,912
Total neurology
Disaggregation of Revenue [Line Items]
Revenues	45,577	20,442	120,632	20,442
Neuraceq
Disaggregation of Revenue [Line Items]
Revenues	45,577	20,442	120,632	20,442
Total cardiology
Disaggregation of Revenue [Line Items]
Revenues	85,673	81,785	258,579	244,935
DEFINITY
Disaggregation of Revenue [Line Items]
Revenues	85,673	81,785	258,579	244,935
Strategic partnerships and other revenue
Disaggregation of Revenue [Line Items]
Revenues	19,733	13,705	55,995	36,042
SPECT
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 27,466	$ 0	$ 84,492