Development, Commercialization and Supply Agreements - Summary of Licensing Revenue (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended		12 Months Ended
		Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
License And Collaboration Agreements [Line Items]
Revenue recognized related to upfront and milestone payments						$ 4,850	$ 15,372
Revenue recognized related to upfront and milestone payments			$ 4,900		$ 15,000
Licenses revenue		$ 42,298		$ 66,056		166,308	232,198
Edding
License And Collaboration Agreements [Line Items]
Revenue recognized related to upfront and milestone payments			$ 4,000		$ 5,000
Edding | Out-licenses
License And Collaboration Agreements [Line Items]
Revenue recognized related to upfront and milestone payments	[1]					19,426
Revenue recognized related to upfront and milestone payments	[1]						$ 9,400
Edding | Out-licenses | Licensing Revenue
License And Collaboration Agreements [Line Items]
Licenses revenue						$ 40,081		$ 20,655

[1] Licensing revenue under the DCS Agreement is recognized concurrent with the input measure of support hours provided by Amarin to Edding in achieving the combined development and regulatory performance obligation, which in the Company’s judgment is the best measure of progress towards satisfying this performance obligation.