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Current assets - trade and other receivables - Summary of current assets - trade and other receivables (Detail) - AUD ($)
$ in Thousands
Jun. 30, 2019
Jun. 30, 2018
Disclosure of financial assets [line items]    
Trade receivables $ 1,440 $ 2,201
Trade and other receivables 1,711 2,536
Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Trade receivables 17 1
Other receivables 112 120
Provision for impairment [member]    
Disclosure of financial assets [line items]    
Trade receivables (17)  
Other receivables (405) (394)
R&D tax rebate receivable [member]    
Disclosure of financial assets [line items]    
Trade receivables 1,440 2,200
Deposits held [member]    
Disclosure of financial assets [line items]    
Other receivables $ 564 $ 609