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Document and Entity Information
Jul. 01, 2025
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001492422
Document Type 8-K
Document Period End Date Jul. 01, 2025
Entity Registrant Name Apellis Pharmaceuticals, Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-38276
Entity Tax Identification Number 27-1537290
Entity Address, Address Line One 100 Fifth Avenue
Entity Address, City or Town Waltham
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02451
City Area Code (617)
Local Phone Number 977-5700
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, $0.0001 par value per share
Trading Symbol APLS
Security Exchange Name NASDAQ
Entity Emerging Growth Company false