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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Mar. 17, 2025
Jun. 30, 2024
Document and Entity Information [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2024    
Securities Act File Number 001-40886    
Entity Registrant Name COGNITION THERAPEUTICS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 13-4365359    
Entity Address, Address Line One 2500 Westchester Ave.    
Entity Address, City or Town Purchase    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10577    
City Area Code 412    
Local Phone Number 481-2210    
Title of 12(b) Security Common Stock, par value $0.001 per share    
Trading Symbol CGTX    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 56,312,451
Entity Common Stock, Shares Outstanding   61,972,946  
Entity Central Index Key 0001455365    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false    
Documents Incorporated by Reference [Text Block] Portions of the Registrant’s definitive Proxy Statement relating to the 2025 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein. The proxy statement will be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year ended December 31, 2024.    
Auditor Name Ernst & Young LLP    
Auditor Firm ID 42    
Auditor Location Philadelphia, PA