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v3.25.2

Current Liabilities - Provisions - Summary of Current Provisions (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Jun. 30, 2024
--- | --- | ---
Current provisions [abstract] |  |
Annual leave | $ 825 | $ 762
Long service lave | 314 | 256
Total current provisions | $ 1,139 | $ 1,018

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- Definition The amount of 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
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | ifrs-full_
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- Definition Current provisions for annual leave. + References No definition available. + Details
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Namespace Prefix: | opt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Current provisions for long service leave. + References No definition available. + Details
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Namespace Prefix: | opt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant