XML 133 R121.htm IDEA: XBRL DOCUMENT v3.25.2

Non-Current Liabilities - Provisions - Summary of Non-Current Liabilities - Provisions (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Jun. 30, 2024
Non-current provisions [abstract]
Long service leave		$ 10
Total non-current provisions	$ 0	$ 10

X

- Definition

The amount of non-current provisions, including provisions for employee benefits. [Refer: Provisions]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 54
-Subparagraph l
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_l&doctype=Standard
-URIDate 2024-03-27

+ Details

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

X

- References

No definition available.

+ Details

Name:	ifrs-full_NoncurrentProvisionsAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Long service leave non-current.

+ References

No definition available.

+ Details

Name:	opt_LongServiceLeaveNoncurrent
Namespace Prefix:	opt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant