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Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Mar. 01, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2023    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Trading Symbol TNYA    
Entity Registrant Name TENAYA THERAPEUTICS, INC.    
Entity Central Index Key 0001858848    
Entity File Number 001-40656    
Entity Incorporation, State or Country Code DE    
Document Annual Report true    
Document Transition Report false    
Entity Tax Identification Number 81-3789973    
Entity Address, Address Line One 171 Oyster Point Boulevard    
Entity Address, Address Line Two Suite 500    
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 825-6990    
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    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Title of 12(b) Security Common Stock $0.0001 par value per share    
Security Exchange Name NASDAQ    
Entity Public Float     $ 271.5
Entity Common Stock, Shares Outstanding   78,516,142  
Documents Incorporated by Reference

Portions of the definitive proxy statement for the Registrant’s 2023 Annual Meeting of Stockholders are incorporated by reference in Part III of this Form 10-K. Such definitive proxy statement will be filed with the Securities and Exchange Commission within 120 days after the end of the Registrant’s 2023 fiscal year ended December 31, 2023.

    
Auditor Firm ID 34    
Auditor Name Deloitte & Touche LLP    
Auditor Location San Francisco, California