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Related party transactions - Additional Information (Detail) - AUD ($)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Related party transactions [abstract]    
Other transactions with related parties $ 0  
Trade receivables from related parties 0 $ 0
Trade payables to related parties 0 0
Loan to related parties 0 0
Loan from related parties $ 0 $ 0