Earnings per share - Additional Information (Detail) - AUD ($) $ in Thousands	12 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Oct. 31, 2016
Earnings per share [line items]
Number of unlisted convertible notes	1,865,000		16,000,000
Face value of convertible notes	$ 464	$ 464
Unlisted options [member]
Earnings per share [line items]
Number of options that have been excluded from the calculations as they were antidilutive	2,775,167

The amount of equity interest of an entity without share capital that the entity does not separately disclose in the same statement or note.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_e&doctype=Standard
-URIDate 2019-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant