Description of Business	12 Months Ended
Description of Business	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Lantheus Holdings, Inc., a Delaware corporation, is the parent company of Lantheus Medical Imaging, Inc. (“LMI”) and LMI is the parent company of Progenics Pharmaceuticals, Inc., a Delaware corporation (“Progenics”). See “Progenics Acquisition”. The Company develops, manufactures and commercializes innovative diagnostic and therapeutic products that assist clinicians in the diagnosis and treatment of cancer, heart disease and other diseases. The Company believes its diagnostic products result in improved diagnostic information that enables healthcare providers to better detect and characterize, or rule out, disease, potentially achieving improved patient outcomes, reducing patient risk and limiting overall costs throughout the healthcare system. The Company’s commercial products are used by oncologists, urologists, nuclear medicine physicians, cardiologists, sonographers, technologists, radiologists, and internal medicine physicians working in a variety of clinical settings. The Company produces and markets its products throughout the U.S., selling primarily to hospitals, independent diagnostic testing facilities, government facilities, integrated delivery networks, radiopharmacies, clinics, and group practices. The Company sells its products outside the U.S. through a combination of direct distribution in Canada and third party distribution relationships in Europe, Canada, Australia, Asia-Pacific, Central America and South America. Sales of the Company’s prostate cancer diagnostic imaging agent, PYLARIFY (as defined below), are generated in the U.S. through a PYLARIFY direct sales team and a sales team at some of our positron emission tomography (“PET”) manufacturing facilities (“PMF”) partners. Sales of the Company’s ultrasound enhancing agent, DEFINITY, are generated in the U.S. and Canada through a DEFINITY direct sales team. In the U.S., the Company’s other nuclear imaging products, including TechneLite, Xenon, NEUROLITE and CARDIOLITE, are primarily sold to commercial radiopharmacies, the majority of which are controlled by or associated with Cardinal, RLS, UPPI, PharmaLogic and Jubilant Radiopharma. A small portion of the Company’s nuclear imaging product sales in the U.S. are generated through the Company’s direct sales force to hospitals and clinics that maintain their own in-house radiopharmaceutical preparation capabilities. We have licensed RELISTOR to Bausch, and the Company collects quarterly royalties based on those sales. AZEDRA sales are generated in the U.S. through an AZEDRA direct sales team. The Company also maintains its own direct sales force in Canada for certain of its products. In Europe, Australia, Asia-Pacific, Central America and South America, the Company generally relies on third party distributors to market, sell and distribute its nuclear imaging and ultrasound enhancing agent products, either on a country-by-country basis or on a multi-country regional basis. The Company’s executive offices are located in Bedford, MA, with additional offices in North Billerica, MA, Somerset, NJ, Montreal, Canada and Lund, Sweden. Progenics Acquisition On June 19, 2020 (the “Closing Date”), pursuant to the Amended and Restated Agreement and Plan of Merger, dated as of February 20, 2020 (the “Merger Agreement”), by and among Holdings, Plato Merger Sub, Inc., a wholly-owned subsidiary of Holdings (“Merger Sub”), and Progenics, Holdings completed the acquisition of Progenics by means of a merger of Merger Sub with and into Progenics, with Progenics surviving such merger as a wholly-owned subsidiary of Holdings (the “Progenics Acquisition”). In accordance with the Merger Agreement, at the effective time of the Progenics Acquisition (the “Effective Time”), each share of Progenics common stock, par value $0.0013 per share, issued and outstanding immediately prior to the Effective Time (other than shares of Progenics common stock owned by Holdings, Progenics or any of their wholly-owned subsidiaries) was automatically cancelled and converted into the right to receive (i) 0.31 (the “Exchange Ratio”) of a share of Holdings common stock, par value $0.01 per share, and (ii) one contingent value right (a “CVR”) tied to the financial performance of PyL (18F-DCFPyL), Progenics’ prostate-specific membrane antigen (“PSMA”) targeted imaging agent designed to visualize prostate cancer. This agent was approved by the U.S. Food and Drug Administration (“FDA”) on May 26, 2021 under the name PYLARIFY (piflufolastat F 18), and the commercial launch of this agent began in June 2021. Each CVR entitles its holder to receive a pro rata share of aggregate cash payments equal to 40% of U.S. net sales generated by PYLARIFY in 2022 and 2023 in excess of $100.0 million and $150.0 million, respectively. In no event will the Company’s aggregate payments in respect of the CVRs, together with any other non-stock consideration treated as paid in connection with the Progenics Acquisition, exceed 19.9% of the total consideration the Company pays in the Progenics Acquisition. Based on the Company’s 2022 PYLARIFY net sales, the Company determined that the aggregate payment obligation under the CVRs was $99.7 million. The Company expects to make that payment during the first half of 2023. As a result of the acquisition, Holdings issued 26,844,877 shares of Holdings common stock and 86,630,633 CVRs to former Progenics stockholders and option holders.