General form of registration statement for all companies including face-amount certificate companies

Document and Entity Information

Document and Entity Information
9 Months Ended
Sep. 30, 2020
Cover [Abstract]  
Entity Registrant Name Hancock Jaffe Laboratories, Inc.
Entity Central Index Key 0001661053
Document Type S-1/A
Amendment Flag true
Amendment Description Amendment No. 1
Entity Filer Category Non-accelerated Filer
Entity Small Business Flag true
Entity Emerging Growth Company true
Entity Ex Transition Period true