Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
6 Months Ended
Jun. 30, 2021
Aug. 05, 2021
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2021  
Document Transition Report false  
Entity File Number 001-38410  
Entity Registrant Name BioXcel Therapeutics, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 82-1386754  
Entity Address, Address Line One 555 Long Wharf Drive  
Entity Address, City or Town New Haven  
Entity Address, State or Province CT  
Entity Address, Postal Zip Code 06511  
City Area Code 475  
Local Phone Number 238-6837  
Title of 12(b) Security Common Stock  
Trading Symbol BTAI  
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 true  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   27,968,988
Entity Central Index Key 0001720893  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q2  
Amendment Flag false