v3.19.2
Document and Entity Information
Aug. 07, 2019
Cover [Abstract]  
Entity Registrant Name FIVE PRIME THERAPEUTICS INC
Amendment Flag false
Entity Central Index Key 0001175505
Document Type 8-K
Document Period End Date Aug. 07, 2019
Entity Incorporation State Country Code DE
Entity File Number 001-36070
Entity Tax Identification Number 26-0038620
Entity Address, Address Line One 111 Oyster Point Boulevard
Entity Address, City or Town South San Francisco
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94080
City Area Code (415)
Local Phone Number 365-5600
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, par value $0.001 per share
Trading Symbol FPRX
Security Exchange Name NASDAQ
Entity Emerging Growth Company false