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Document and Entity Information
Dec. 31, 2020
Cover [Abstract]  
Security Exchange Name NASDAQ
Amendment Flag false
Entity Central Index Key 0001404281
Document Type 8-K
Document Period End Date Dec. 31, 2020
Entity Registrant Name Eledon Pharmaceuticals, Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-36620
Entity Tax Identification Number 20-1000967
Entity Address, Address Line One 19900 MacArthur Blvd.
Entity Address, Address Line Two Suite 550
Entity Address, City or Town Irvine
Entity Address, State or Province CA
Entity Address, Postal Zip Code 92612
City Area Code (949)
Local Phone Number 238-8090
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, $0.001 par value
Trading Symbol ELDN
Entity Emerging Growth Company false