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Licensing Agreement	9 Months Ended
Licensing Agreement	Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Licensing Agreement	Licensing Agreement Dimerix Limited On April 30, 2025, the Company entered into an exclusive license agreement with Dimerix Limited ("Dimerix") for the commercialization of Dimerix' Phase 3 drug candidate, DMX-200, in the United States for treatment of Focal Segmental Glomerulosclerosis ("FSGS") and other indications. In exchange for these rights, the Company paid Dimerix an upfront payment of $30 million, which was recorded as a component of research and development expense in the Company's Consolidated Statement of Operations. The Company will be obligated to pay Dimerix for certain success-based development and regulatory milestones for FSGS of up to a maximum aggregate amount of $75 million, regulatory milestones for other indications of up to a maximum aggregate amount of $40 million, commercial milestones of up to a maximum aggregate amount of $445 million, and tiered royalties of DMX-200 net sales in the U.S. ranging from the low-teens to low-twenties. Dimerix will continue to fund and execute the Phase 3 study of DMX-200 ("ACTION3"), and Amicus will be responsible for submission and maintenance of the regulatory dossier in the United States, as well as all costs of commercialization activities. Additionally, Amicus will have the exclusive rights to develop DMX-200 in other future indications in the United States. Amicus and Dimerix have formed a Joint Steering Committee to align the development and commercialization of DMX-200 in FSGS in U.S. The agreement otherwise contains terms common for an arrangement of this kind.