Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Aug. 05, 2022
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
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		41,094,053
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, $0.0001 par value
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	44 West Gay Street
Entity Address, Address Line Two	Suite 400
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