Annual report pursuant to Section 13 and 15(d)

Cover Page

Cover Page - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Mar. 09, 2020
Jun. 28, 2019
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Entity Interactive Data Current Yes    
Document Period End Date Dec. 31, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Trading Symbol CFRX    
Entity Registrant Name CONTRAFECT Corp    
Entity Central Index Key 0001478069    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Current Reporting Status Yes    
Entity Emerging Growth Company false    
Entity Public Float     $ 40.0
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   15,332,042