Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2020
Sep. 15, 2020
Dec. 31, 2019
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jun. 30, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Trading Symbol KTRA    
Title of 12(b) Security Common Stock    
Security Exchange Name NASDAQ    
Entity Registrant Name Kintara Therapeutics, Inc.    
Entity Central Index Key 0001498382    
Current Fiscal Year End Date --06-30    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Public Float     $ 7.7
Entity Common Stock, Shares Outstanding   23,543,892  
Entity Shell Company false    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Incorporation, State or Country Code NV    
Entity File Number 001-37823    
Entity Tax Identification Number 99-0360497    
Entity Address, Address Line One 12707 High Bluff Dr    
Entity Address, Address Line Two Suite 200    
Entity Address, City or Town San Diego    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 92130    
City Area Code 858    
Local Phone Number 350-4364    
Document Annual Report true    
Document Transition Report false    
Documents Incorporated by Reference