XML 7 R1.htm IDEA: XBRL DOCUMENT v3.24.3
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2024
Oct. 27, 2024
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2024  
Document Fiscal Year Focus 2024  
Document Fiscal Period Focus Q3  
Entity Registrant Name MERUS N.V.  
Trading Symbol MRUS  
Entity Central Index Key 0001651311  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Interactive Data Current Yes  
Entity Common Stock, Shares Outstanding   68,463,681
Entity File Number 001-37773  
Entity Incorporation, State or Country Code P7  
Entity Tax Identification Number 00-0000000  
Entity Address, Address Line One Uppsalalaan 17  
Entity Address, City or Town Utrecht  
Entity Address, Postal Zip Code 3584 CT  
Entity Address, Country NL  
City Area Code +31 85  
Local Phone Number 016 2500  
Document Quarterly Report true  
Document Transition Report false  
Title of 12(b) Security Common shares, nominal value €0.09 per share  
Security Exchange Name NASDAQ