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v3.25.2

Non-Current Assets - Right of Use Assets - Additional Information (Details) | 12 Months Ended
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Jun. 30, 2025
Disclosure of quantitative information about right-of-use assets [abstract] |
Lease contract term | 3 years
Lease expiration date | Jul. 14, 2025

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- References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Lease contract term. + References No definition available. + Details
Name: | opt_LeaseContractTerm
Namespace Prefix: | opt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Lease expiration period. + References No definition available. + Details
Name: | opt_LeaseExpirationPeriod
Namespace Prefix: | opt_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration