Quarterly report pursuant to Section 13 or 15(d)

Cover Page

Cover Page - shares
9 Months Ended
Sep. 30, 2019
Nov. 07, 2019
Cover [Abstract]    
Document Type 10-Q  
Entity Interactive Data Current Yes  
Amendment Flag false  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Trading Symbol CFRX  
Entity Registrant Name CONTRAFECT Corp  
Entity Central Index Key 0001478069  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Current Reporting Status Yes  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Title of 12(b) Security Common Stock  
Security Exchange Name NASDAQ  
Entity Address, State or Province NY  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   79,409,556