v3.19.2
Document and Entity Information
Aug. 19, 2019
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001501989
Document Type 8-K
Document Period End Date Aug. 19, 2019
Entity Registrant Name CYTOMX THERAPEUTICS, INC.
Entity Incorporation State Country Code DE
Entity File Number 001-37587
Entity Tax Identification Number 27-3521219
Entity Address, Address Line One 151 Oyster Point Blvd.
Entity Address, Address Line Two Suite 400
Entity Address, City or Town South San Francisco
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94080
City Area Code (650)
Local Phone Number 515-3185
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, par value $0.00001
Trading Symbol CTMX
Security Exchange Name NASDAQ
Entity Emerging Growth Company false