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Document And Entity Information
Sep. 22, 2022
Document Type 8-K
Amendment Flag false
Document Period End Date Sep. 22, 2022
Entity Registrant Name Cassava Sciences, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 000-29959
Entity Tax Identification Number 91-1911336
Entity Address, Address Line One 6801 N Capital of Texas Highway
Entity Address, Address Line Two Building 1; Suite 300
Entity Address, City or Town Austin
Entity Address, State or Province TX
Entity Address, Postal Zip Code 78731
City Area Code 512
Local Phone Number 501-2444
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 SAVA
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Central Index Key 0001069530
Former Address [Member]  
Entity Address, Address Line One 7801 N Capital of Texas Highway
Entity Address, Address Line Two Suite 260
Entity Address, City or Town Austin
Entity Address, State or Province TX
Entity Address, Postal Zip Code 78731