Fair Value of Financial Instruments - Narrative (Details) $ in Millions	6 Months Ended
Jun. 30, 2024 USD ($)
Fair Value, Option, Quantitative Disclosures [Line Items]
Change in fair value of the contingent financial asset and contingent financial liabilities	$ 0.1
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	General and administrative
2.625% Convertible Senior Notes due 2027 \| Convertible Debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Long-term debt	$ 575.0
Debt instrument, fair value	715.1
Progenics
Fair Value, Option, Quantitative Disclosures [Line Items]
Potential payments, high	85.0
Progenics \| Net Sales Targets for Azedra
Fair Value, Option, Quantitative Disclosures [Line Items]
Potential payments, high	70.0
Progenics \| 1095 commercialization milestone
Fair Value, Option, Quantitative Disclosures [Line Items]
Potential payments, high	5.0
Progenics \| 1404 Commercialization Milestone
Fair Value, Option, Quantitative Disclosures [Line Items]
Potential payments, high	$ 10.0

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Amount of unrealized gain (loss) recognized in income for derivative asset (liability) after deduction of derivative liability (asset), measured at fair value using unobservable input (level 3) and still held.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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