v3.25.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2025
May 09, 2025
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Securities Act 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 false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   6,056,046
Entity Central Index Key 0001720893  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Amendment Flag false