v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Sep. 03, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-42771  
Entity Registrant Name Shoulder Innovations, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 27-0538764  
Entity Address, Address Line One 1535 Steele Avenue SW  
Entity Address, Address Line Two Suite B  
Entity Address, City or Town Grand Rapids  
Entity Address, State or Province MI  
Entity Address, Postal Zip Code 49507  
City Area Code 616  
Local Phone Number 294-1026  
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol SI  
Security Exchange Name NYSE  
Entity Current Reporting Status No  
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   20,359,960
Entity Central Index Key 0001699350  
Amendment Flag false  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --12-31