v3.26.1
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Apr. 27, 2026
Jun. 30, 2025
Document and Entity Information      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Document Transition Report false    
Entity File Number 001-40363    
Entity Registrant Name TRANSCODE THERAPEUTICS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 81-1065054    
Entity Address State Or Province MA    
Entity Address, Address Line One 6 Liberty Square, #2382    
Entity Address, City or Town Boston    
Entity Address, Postal Zip Code 02109    
City Area Code 857    
Local Phone Number 837-3099    
Title of 12(b) Security Common Stock, $0.0001 par value per share    
Trading Symbol RNAZ    
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    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 6.5
Entity Common Stock, Shares Outstanding   916,968  
Auditor Firm ID 100    
Auditor Name WithumSmith+Brown, PC    
Auditor Location East Brunswick, New Jersey    
Entity Central Index Key 0001829635    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false