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Current assets - trade and other receivables - Summary of current assets - trade and other receivables (Detail) - AUD ($)
$ in Thousands
Jun. 30, 2018
Jun. 30, 2017
Disclosure of financial assets [line items]    
Trade receivables $ 2,201 $ 3,978
Trade and other receivables 2,536 4,262
Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Trade receivables 1 231
Other receivables 120 77
Provision for impairment [member]    
Disclosure of financial assets [line items]    
Trade receivables   (226)
Other receivables (394) (371)
R&D tax rebate receivable [member]    
Disclosure of financial assets [line items]    
Trade receivables 2,200 3,973
Deposits held [member]    
Disclosure of financial assets [line items]    
Other receivables $ 609 $ 578