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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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Number of shares of investment owned.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

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Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity.

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Acquisition of Assets (Details) $ / shares in Units, $ in Thousands, € in Millions								1 Months Ended			3 Months Ended			6 Months Ended	9 Months Ended
	Jun. 27, 2024 USD ($)	Jun. 27, 2024 EUR (€)	Jun. 26, 2024 USD ($)	Jun. 18, 2024 USD ($)	Jun. 15, 2024 USD ($) licensed_asset $ / shares shares	Jun. 14, 2024	Jan. 08, 2024 USD ($)	Aug. 31, 2024 USD ($)	May 31, 2023 USD ($)	Feb. 28, 2023 USD ($)	Sep. 30, 2024 USD ($) $ / shares shares	Mar. 31, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2024 USD ($) shares	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($)	Mar. 06, 2024 $ / shares shares	Jan. 22, 2024 $ / shares shares
Asset Acquisition [Line Items]
Acquisition of exclusive license option															$ 28,000	$ 0
Research and development											$ 24,148		$ 14,450		$ 132,773	$ 60,883
Perspective Therapeutics, Inc
Asset Acquisition [Line Items]
Conversion ratio						0.1
Radiopharm Theranostics Limited
Asset Acquisition [Line Items]
Payments to acquire equity method investments					$ 5,000
Equity investment, shares (in shares) \| shares					149,625,180										149,625,180
Share price (in dollars per share) \| $ / shares					$ 0.03						$ 0.02				$ 0.02
Forecast \| Radiopharm Theranostics Limited
Asset Acquisition [Line Items]
Payments to acquire equity method investments														$ 5,000
Equity investment, shares (in shares) \| shares														149,925,040
Agreement with Perspective Therapeutics, Inc
Asset Acquisition [Line Items]
Disposal group consideration							$ 8,000
Perspective Therapeutics, Inc
Asset Acquisition [Line Items]
Research and development												$ 28,000
Perspective Therapeutics, Inc \| Licenses
Asset Acquisition [Line Items]
Acquisition of exclusive license option							$ 28,000
Perspective Therapeutics, Inc
Asset Acquisition [Line Items]
Subsidiary, ownership percentage, noncontrolling owner																	19.90%
Shares owned (in shares) \| shares					11,677,339						11,677,339				11,677,339
Share price (in dollars per share) \| $ / shares											$ 13.35				$ 13.35
Perspective Therapeutics, Inc, Fully Diluted Basis
Asset Acquisition [Line Items]
Subsidiary, ownership percentage, noncontrolling owner																	17.35%
Perspective Common Stock
Asset Acquisition [Line Items]
Shares acquired (in shares) \| shares																	60,431,039	56,342,355
Percentage of acquired interest																		11.39%
Share price (in dollars per share) \| $ / shares																	$ 0.95	$ 0.37
Cerveau Technologies, Inc
Asset Acquisition [Line Items]
Payment for acquisitions									$ 10,000	$ 35,300
Asset acquisition, additional milestone payments										51,000
Cerveau Technologies, Inc \| Sales Milestones
Asset Acquisition [Line Items]
Asset acquisition, additional milestone payments										1,200,000
Cerveau Technologies, Inc \| Research Revenue Milestones
Asset Acquisition [Line Items]
Asset acquisition, additional milestone payments										$ 13,500
Radiopharm Theranostics Limited
Asset Acquisition [Line Items]
Payment for acquisitions					$ 2,000
Asset acquisition, additional milestone payments					$ 20,000
Research and development															$ 2,000
Number of licensed asset acquired \| licensed_asset					2
Radiopharm Theranostics Limited \| Sales Milestones
Asset Acquisition [Line Items]
Asset acquisition, additional milestone payments					$ 6,500
Meilleur Technologies, Inc
Asset Acquisition [Line Items]
Payment for acquisitions				$ 32,900				$ 10,000
Asset acquisition, additional milestone payments				43,000
Meilleur Technologies, Inc \| Sales Milestones
Asset Acquisition [Line Items]
Asset acquisition, additional milestone payments				830,000
Meilleur Technologies, Inc \| Research Revenue Milestones
Asset Acquisition [Line Items]
Asset acquisition, additional milestone payments				$ 5,000
Life Molecular Imaging, RM2 Technology
Asset Acquisition [Line Items]
Payment for acquisitions	$ 35,000		$ 1,000
Research and development															$ 36,000
Life Molecular Imaging, RM2 Technology \| Sales Milestones
Asset Acquisition [Line Items]
Asset acquisition, additional milestone payments \| €		€ 280.0
Life Molecular Imaging, RM2 Technology \| Regulatory Milestones
Asset Acquisition [Line Items]
Asset acquisition, additional milestone payments \| €		132.5
Life Molecular Imaging, RM2 Technology \| Collaboration Payments
Asset Acquisition [Line Items]
Asset acquisition, additional milestone payments \| €		25.0
Life Molecular Imaging, RM2 Technology \| Development Services
Asset Acquisition [Line Items]
Asset acquisition, additional milestone payments \| €		€ 5.0