Earnings per share - Additional Information (Detail) - AUD ($)	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Oct. 31, 2016
Earnings per share [line items]
Number of unlisted convertible notes	1,865,000		16,000,000
Face value of convertible notes	$ 464,000	$ 464,000
Unlisted options [member]
Earnings per share [line items]
Number of options that have been excluded from the calculations as they were antidilutive	4,446,500

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 2020-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_e&doctype=Standard
-URIDate 2020-01-01

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