Document And Entity Information
Jan. 07, 2022
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jan. 07, 2022
Entity Registrant Name SUTRO BIOPHARMA, INC.
Entity Central Index Key 0001382101
Entity Emerging Growth Company false
Entity File Number 001-38662
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 47-0926186
Entity Address, Address Line One 111 Oyster Point Blvd
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 881-6500
Entity Information, Former Legal or Registered Name Not Applicable
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.001 par value
Trading Symbol STRO
Security Exchange Name NASDAQ