Quarterly report pursuant to Section 13 or 15(d)

Cover Page

Cover Page - shares
3 Months Ended
Mar. 31, 2021
May 10, 2021
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Entity Interactive Data Current Yes  
Document Period End Date Mar. 31, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q1  
Trading Symbol CFRX  
Entity Registrant Name CONTRAFECT Corp  
Entity Central Index Key 0001478069  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Current Reporting Status Yes  
Entity Emerging Growth Company false  
Title of 12(b) Security Common Stock  
Security Exchange Name NASDAQ  
Entity Shell Company false  
Entity Address, State or Province NY  
Entity Common Stock, Shares Outstanding   39,332,721
Document Quarterly Report true  
Document Transition Report false