v3.23.1
Document and Entity Information
 9 Months Ended
Jan. 31, 2023
Document Information [Line Items]  
Document Type S-1
Amendment Flag false
Entity Registrant Name Heart Test Laboratories, Inc.
Entity Central Index Key 0001468492
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Incorporation, State or Country Code TX
Entity Primary SIC Number 3345
Entity Tax Identification Number 26-1344466
Entity Address, Address Line One 550 Reserve St
Entity Address, Address Line Two Suite 360
Entity Address, City or Town Southlake
Entity Address, State or Province TX
Entity Address, Postal Zip Code 76092
City Area Code 682
Local Phone Number 237-7781
Business Contact  
Document Information [Line Items]  
Entity Address, Address Line One 550 Reserve St
Entity Address, Address Line Two Suite 360
Entity Address, City or Town Southlake
Entity Address, State or Province TX
Entity Address, Postal Zip Code 76092
City Area Code 682
Local Phone Number 237-7781
Contact Personnel Name Danielle Watson