Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Jul. 22, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Trading Symbol CNAT  
Entity Registrant Name Conatus Pharmaceuticals Inc.  
Entity Central Index Key 0001383701  
Entity Current Reporting Status Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Address, Address Line One 16745 W. Bernardo Dr.  
Entity Address, Address Line Two Suite 200  
Entity Address, City or Town San Diego  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 92127  
City Area Code (858)  
Local Phone Number 376-2600  
Entity File Number 001-36003  
Entity Tax Identification Number 203183915  
Entity Common Stock, Shares Outstanding   33,170,487