Auditor's Remuneration - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Auditors remuneration [Line Items]
Tax compliance services	$ 657	$ 631	$ 1,091
Tax compliance services [member]
Auditors remuneration [Line Items]
Tax compliance services	$ 0	$ 27	$ 89

The amount of fees paid or payable to the entity's auditors for services that the entity does not separately disclose in the same statement or note.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

Name:	ifrs-full_AuditorsRemunerationForOtherServices
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration