Current report filing

Document and Entity Information

Document and Entity Information
Jun. 10, 2021
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001042074
Document Type 8-K
Document Period End Date Jun. 10, 2021
Entity Registrant Name CymaBay Therapeutics, Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-36500
Entity Tax Identification Number 94-3103561
Entity Address, Address Line One 7575 Gateway Blvd.
Entity Address, Address Line Two Suite 110
Entity Address, City or Town Newark
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94560
City Area Code (510)
Local Phone Number 293-8800
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 CBAY
Security Exchange Name NASDAQ
Entity Emerging Growth Company false