XML 11 R1.htm IDEA: XBRL DOCUMENT v3.23.2
Document And Entity Information - shares
6 Months Ended
Jun. 30, 2023
Jul. 28, 2023
Document Information [Line Items]    
Entity Central Index Key 0001738021  
Entity Registrant Name Compass Therapeutics, Inc.  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2023  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2023  
Document Transition Report false  
Entity File Number 001-39696  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 82-4876496  
Entity Address, Address Line One 80 Guest St., Suite 601  
Entity Address, City or Town Boston  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 02135  
City Area Code 617  
Local Phone Number 500-8099  
Title of 12(b) Security Common Stock, $0.0001 par value per share  
Trading Symbol CMPX  
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   127,459,346