v3.26.1
COVER - shares
 6 Months Ended
Jun. 30, 2026
Jul. 30, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Transition Report false  
Entity File Number 001-39248  
Entity Registrant Name Starling Oncology, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 84-3562323  
Entity Address, Address Line One 18000 Studebaker Road, Suite 800  
Entity Address, City or Town Cerritos  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 90703  
City Area Code 562  
Local Phone Number 735-3226  
Entity Information, Former Legal or Registered Name The Oncology Institute, Inc.  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   101,916,115
Entity Central Index Key 0001799191  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Common Stock, $0.0001 par value per share  
Trading Symbol STLN  
Security Exchange Name NASDAQ  
Warrant    
Document Information [Line Items]    
Title of 12(b) Security Redeemable warrants, each whole warrant exercisable for one share of Common stock, each at an exercise price of $11.50 per share  
Trading Symbol TOIIW  
Security Exchange Name NASDAQ