XML 11 R1.htm IDEA: XBRL DOCUMENT v3.24.3
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2024
Oct. 28, 2024
Document Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2024  
Securities Act File Number 001-38916  
Entity Registrant Name Bicycle Therapeutics plc  
Entity Incorporation, State or Country Code X0  
Entity Tax Identification Number 00-0000000  
Entity Address, Address Line One Blocks A & B, Portway Building, Granta Park  
Entity Address, City or Town Great Abington, Cambridge,  
Entity Address, Country GB  
Entity Address, Postal Zip Code CB21 6GS  
City Area Code +44  
Local Phone Number 1223 261503  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2024  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0001761612  
Amendment Flag false  
Common Stock [Member]    
Document Information    
Title of 12(b) Security Ordinary shares, nominal value £0.01 per share*  
No Trading Symbol Flag true  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   47,553,922
ADR [Member]    
Document Information    
Title of 12(b) Security American Depositary Shares, each representing one ordinary share, nominal value £0.01 per share  
Trading Symbol BCYC  
Security Exchange Name NASDAQ  
Non-voting ordinary shares    
Document Information    
Entity Common Stock, Shares Outstanding   21,492,099