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Significant accounting policies - Additional Information (Detail)
$ in Millions
 12 Months Ended
Jun. 30, 2022
AUD ($)
Jun. 30, 2021
AUD ($)
Jun. 30, 2020
AUD ($)
May 01, 2022
USD ($)
Jun. 30, 2019
AUD ($)
Disclosure of summary of significant accounting policies [line items]          
Consolidated loss after income tax $ 24,647,815 $ 8,421,960 $ 12,467,000    
Net current asset position 2,923,084 21,064,264      
Net cash outflows from operating activities 22,762,663 9,110,516      
Consolidated cash in hand and at bank $ 7,361,112 $ 27,586,760 $ 8,764,000   $ 5,434,000
At The Market Equity Program [Member]          
Disclosure of summary of significant accounting policies [line items]          
Aggregate offering       $ 35  
American Depository Shares [Member] | At The Market Equity Program [Member]          
Disclosure of summary of significant accounting policies [line items]          
Number of shares represented by one depositary receipt       10  
Licensing agreement for paxalisib [member]          
Disclosure of summary of significant accounting policies [line items]          
Remaining useful life,licensing agreement 15 years        
Licensing agreement for EVT801 [member]          
Disclosure of summary of significant accounting policies [line items]          
Remaining useful life,licensing agreement 12.5 years