The Company	6 Months Ended
Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company	1. THE COMPANY Alkermes plc is a global biopharmaceutical company that seeks to develop innovative medicines in the field of neuroscience. Alkermes has a portfolio of proprietary commercial products for the treatment of alcohol dependence, opioid dependence, schizophrenia and bipolar I disorder and a pipeline of clinical and preclinical candidates in development for neurological disorders, including narcolepsy. Headquartered in Ireland, Alkermes also has a corporate office and research and development (“R&D”) center in Massachusetts and a manufacturing facility in Ohio. On May 1, 2024, the Company completed the previously announced sale of its development and manufacturing facility in Athlone, Ireland (the “Athlone Facility”) to Novo Nordisk (“Novo”). The Company and Novo also entered into subcontracting arrangements to continue certain development and manufacturing activities currently performed at the Athlone Facility for a period of time after the closing of the transaction; these activities may continue through the end of 2025. In connection with the sale of the Athlone Facility, the Company received approximately $97.9 million from Novo, which included a payment of approximately $91.0 million for the facility and certain related assets, and recorded a gain of approximately $1.5 million within “Other income (expense), net” in the accompanying condensed consolidated statements of operations and comprehensive income for the three and six months ended June 30, 2024. At December 31, 2023, the Company classified the assets described under the asset purchase agreement for the sale as “Assets held for sale” in the accompanying condensed consolidated balance sheets.

The Company

6 Months Ended

Jun. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

1. THE COMPANY

Alkermes plc is a global biopharmaceutical company that seeks to develop innovative medicines in the field of neuroscience. Alkermes has a portfolio of proprietary commercial products for the treatment of alcohol dependence, opioid dependence, schizophrenia and bipolar I disorder and a pipeline of clinical and preclinical candidates in development for neurological disorders, including narcolepsy. Headquartered in Ireland, Alkermes also has a corporate office and research and development (“R&D”) center in Massachusetts and a manufacturing facility in Ohio.

On May 1, 2024, the Company completed the previously announced sale of its development and manufacturing facility in Athlone, Ireland (the “Athlone Facility”) to Novo Nordisk (“Novo”). The Company and Novo also entered into subcontracting arrangements to continue certain development and manufacturing activities currently performed at the Athlone Facility for a period of time after the closing of the transaction; these activities may continue through the end of 2025. In connection with the sale of the Athlone Facility, the Company received approximately $97.9 million from Novo, which included a payment of approximately $91.0 million for the facility and certain related assets, and recorded a gain of approximately $1.5 million within “Other income (expense), net” in the accompanying condensed consolidated statements of operations and comprehensive income for the three and six months ended June 30, 2024. At December 31, 2023, the Company classified the assets described under the asset purchase agreement for the sale as “Assets held for sale” in the accompanying condensed consolidated balance sheets.