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Non-current assets - intangibles - Summary of non-current assets - intangibles (Detail) - AUD ($)
$ in Thousands
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Disclosure of detailed information about intangible assets [line items]      
Intangibles $ 13,494 $ 14,579 $ 15,918
Patents and intellectual property [member]      
Disclosure of detailed information about intangible assets [line items]      
Intangibles     250
Patents and intellectual property [member] | Gross carrying amount [member]      
Disclosure of detailed information about intangible assets [line items]      
Intangibles 2,851 2,851  
Patents and intellectual property [member] | Accumulated depreciation and amortisation [member]      
Disclosure of detailed information about intangible assets [line items]      
Intangibles (2,851) (2,851)  
GDC licensing agreement [member]      
Disclosure of detailed information about intangible assets [line items]      
Intangibles 13,494 14,579 $ 15,663
GDC licensing agreement [member] | Gross carrying amount [member]      
Disclosure of detailed information about intangible assets [line items]      
Intangibles 16,408 16,408  
GDC licensing agreement [member] | Accumulated depreciation and amortisation [member]      
Disclosure of detailed information about intangible assets [line items]      
Intangibles $ (2,914) $ (1,829)