XML 21 R1.htm IDEA: XBRL DOCUMENT v3.22.4
Document And Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2022
Feb. 23, 2023
Jun. 30, 2022
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2022    
Document Period End Date Dec. 31, 2022    
Document Transition Report false    
Entity File Number 000-29959    
Entity Registrant Name Cassava Sciences, Inc.    
Entity Incorporation, State or Country Code DE    
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    
Title of 12(b) Security Common Stock, $0.001 par value    
Trading Symbol SAVA    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 1.1
Entity Common Stock, Shares Outstanding   41,735,557  
Documents Incorporated by Reference Portions of the Registrant's proxy statement for its 2023 Annual Meeting of Stockholders (the “Proxy Statement”), to be filed with the U.S. Securities and Exchange Commission, no later than 120 days after the Registrant’s fiscal year ended December 31, 2022, are incorporated by reference to Part III of this Annual Report on Form 10-K.    
Entity Central Index Key 0001069530    
Auditor Name Ernst & Young LLP    
Auditor Location Austin, Texas    
Auditor Firm ID 42