v3.19.2
Document and Entity Information
Aug. 21, 2019
Document And Entity Information [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Aug. 21, 2019
Entity Registrant Name FIBROGEN INC
Entity Central Index Key 0000921299
Entity Emerging Growth Company false
Entity File Number 001-36740
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 77-0357827
Entity Address, Address Line One 409 Illinois Street
Entity Address, City or Town San Francisco
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94158
City Area Code 415
Local Phone Number 978-1200
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of each class Common Stock, $0.01 par value
Trading Symbol FGEN
Name of each exchange on which registered NASDAQ