v3.26.1
COVER PAGE - shares
 3 Months Ended
Mar. 31, 2026
May 11, 2026
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-40675  
Entity Registrant Name Immuneering Corporation  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 26-1976972  
Entity Address, Address Line One 245 Main St  
Entity Address, Address Line Two Second Floor  
Entity Address, City or Town Cambridge  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 02142  
City Area Code 617  
Local Phone Number 500-8080  
Title of 12(b) Security Class A common Stock, par value $0.001 per share  
Trading Symbol IMRX  
Security Exchange Name NASDAQ  
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  
Entity Shell Company false  
Entity Central Index Key 0001790340  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Class A Common Stock    
Entity Common Stock, Shares Outstanding   64,697,402
Class B Common Stock    
Entity Common Stock, Shares Outstanding   0