v3.19.3
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Nov. 01, 2019
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Trading Symbol VRCA  
Entity Interactive Data Current Yes  
Entity Registrant Name Verrica Pharmaceuticals Inc.  
Entity Central Index Key 0001660334  
Entity Current Reporting Status Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   25,775,164
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transaction Period true  
Entity File Number 001-38529  
Entity Tax Identification Number 46-3137900  
Title of 12(b) Security Common Stock  
Security Exchange Name NASDAQ  
Document Quarterly Report true  
Document Transition Report false  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 10 North High Street  
Entity Address, Address Line Two Suite 200  
Entity Address, City or Town West Chester  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19380  
City Area Code 484  
Local Phone Number 453-3300