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v3.25.3

Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 31, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Apr. 01, 2025 | Dec. 31, 2024 | Jun. 15, 2024
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |  |  |  |
Unrealized gain (loss) on investment in equity securities |  |  |  | $ 871 | $ 75,492 |  |  |
Business combination contingent consideration liability |  | $ 97,824 |  | 97,824 |  |  |  |
Life Molecular Imaging Inc |  |  |  |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |  |  |  |
Asset acquisition, additional milestone payments |  |  |  | 400,000 |  |  |  |
Milestone payments in cash |  |  |  | 30,000 |  |  |  |
Progenics |  |  |  |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |  |  |  |
Payments for prior acquisition |  |  |  | 85,000 |  |  |  |
Business combination contingent consideration liability |  | 0 |  | 0 |  |  | $ 0 |
Progenics | Net Sales Targets for Azedra |  |  |  |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |  |  |  |
Potential payments, high |  | 70,000 |  | 70,000 |  |  |  |
Progenics | 1095 Commercialization [Member] |  |  |  |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |  |  |  |
Potential payments, high |  | 5,000 |  | 5,000 |  |  |  |
Progenics | 1404 Commercialization Milestone |  |  |  |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |  |  |  |
Potential payments, high |  | $ 10,000 |  | $ 10,000 |  |  |  |
Evergreen Theragnostics |  |  |  |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |  |  |  |
Business combination contingent consideration liability |  |  |  |  |  | $ 25,000 |  |
Evergreen Theragnostics | Additional Remaining Payments |  |  |  |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |  |  |  |
Business combination contingent consideration liability |  |  |  |  |  | $ 727,500 |  |
Radiopharm Theranostics Limited |  |  |  |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |  |  |  |
Shares owned (in shares) | 133,333,333 | 282,958,513 | 149,625,180 | 282,958,513 | 149,625,180 |  | 149,625,180 |
Investment owned, fair value |  | $ 5,400 |  | $ 5,400 |  |  |  |
Share price (in dollars per share) | $ 0.04 | $ 0.02 | $ 0.03 | $ 0.02 | $ 0.03 |  |  |
Unrealized gain (loss) on investment in equity securities |  | $ 1,200 |  | $ (2,000) |  |  |  |
Purchase amount in investment in equity securities | $ 5,000 |  | $ 5,000 |  |  |  |  |
Perspective Therapeutics, Inc |  |  |  |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |  |  |  |
Shares owned (in shares) |  | 11,677,339 |  | 11,677,339 |  |  |  | 11,677,339
Investment owned, fair value |  | $ 40,100 |  | $ 40,100 |  |  |  |
Share price (in dollars per share) |  | $ 3.43 |  | $ 3.43 |  |  |  |
Unrealized gain (loss) on investment in equity securities |  | $ (100) |  | $ 2,800 |  |  |  |

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