XML 61 R1.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2019
Feb. 21, 2020
Jun. 30, 2019
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Trading Symbol APLS    
Entity Registrant Name APELLIS PHARMACEUTICALS, INC.    
Entity Central Index Key 0001492422    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   75,321,471  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Public Float     $ 1,151,210,910
Entity Current Reporting Status Yes    
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    
Entity Interactive Data Current Yes    
Title of 12(b) Security Common Stock, $0.0001 par value per share    
Security Exchange Name NASDAQ    
Entity Incorporation, State or Country Code DE    
Document Annual Report true    
Document Transition Report false    
Documents Incorporated by Reference

The registrant intends to file a definitive proxy statement pursuant to Regulation 14A in connection with its 2020 Annual Meeting of Stockholders.   Portions of such proxy statement are incorporated by reference into Part III of this Annual Report on Form 10-K.