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Cover - shares
 3 Months Ended
Mar. 31, 2026
Apr. 27, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-41614  
Entity Registrant Name MINERALYS THERAPEUTICS, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 84-1966887  
Entity Address, Address Line One 150 N. Radnor Chester Road  
Entity Address, Address Line Two Suite F200  
Entity Address, City or Town Radnor  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19087  
City Area Code 888  
Local Phone Number 378-6240  
Title of 12(b) Security Common stock, $0.0001 par value per share  
Trading Symbol MLYS  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   82,498,101
Entity Central Index Key 0001933414  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Document Fiscal Year End Date --12-31