XML 82 R70.htm IDEA: XBRL DOCUMENT
v3.25.2

Current and Non-Current Liabilities - Financial Liabilities - DFA (Tables) | 12 Months Ended
--- | ---
Jun. 30, 2025
Categories of non-current financial liabilities [abstract] |
Disclosure of Summary of Current and Noncurrent Financial Liabilities DFA |
|  | June 30, 2025 |  |  | June 30, 2024 |
|  | US$(000's) |  |  | US$(000's) |
Carrying amount at July 1 |  |  | 200,536 |  |  |  | 85,660 |
Funding at fair value |  |  | — |  |  |  | 85,000 |
Interest expense on DFA (includes amounts to related parties $32,793 (2024: $24,699)) |  |  | 46,457 |  |  |  | 30,263 |
Gain on remeasurement of financial liability - DFA |  |  | — |  |  |  | (387 | )
Total non-current financial liabilities |  |  | — |  |  |  | 200,536 |
Total current financial liabilities |  |  | 246,993 |  |  |  | — |

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

X
- Definition Disclosure of summary of current and noncurrent financial liabilities D F A explanatory. + References No definition available. + Details
Name: | opt_DisclosureOfSummaryOfCurrentAndNoncurrentFinancialLiabilitiesDFAExplanatory
Namespace Prefix: | opt_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration