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Non-current assets - property, plant and equipment - Summary of non-current assets - property, plant and equipment (Detail) - AUD ($)
$ in Thousands
Jun. 30, 2018
Jun. 30, 2017
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment $ 1 $ 490
Plant and equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment 1 $ 106
Plant and equipment [member] | Gross carrying amount [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment 2  
Plant and equipment [member] | Accumulated depreciation and amortisation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment $ (1)