v3.22.2.2
Cover
Oct. 04, 2022
Cover [Abstract]  
Document Type 8-K
Entity Registrant Name SESEN BIO, INC.
Entity Incorporation, State or Country Code DE
Entity File Number 001-36296
Entity Tax Identification Number 26-2025616
Entity Address, Address Line One 245 First Street
Entity Address, Address Line Two Suite 1800
Entity Address, City or Town Cambridge
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02142
City Area Code 617
Local Phone Number 444-8550
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.001
Trading Symbol SESN
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Central Index Key 0001485003
Amendment Flag false
Document Period End Date Oct. 04, 2022