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Cover
 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Mar. 31, 2021  
Entity Registrant Name   TARSUS PHARMACEUTICALS, INC.
Entity Incorporation, State or Country Code DE  
Entity File Number 012-3456  
Entity Tax Identification Number 81-4717861  
Entity Address, Address Line One 15440 Laguna Canyon Road, Suite 160  
Entity Address, City or Town Irvine  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 92618  
City Area Code 949  
Local Phone Number 409-9820  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Title of 12(b) Security Common Stock, $0.0001 par value per share  
Trading Symbol TARS  
Security Exchange Name NASDAQ  
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Entity Central Index Key 0001819790  
Amendment Flag false