XML 102 R90.htm IDEA: XBRL DOCUMENT
v3.25.2

Interest Expense on DFA - Additinal Information (Details) | 12 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Material income and expense [abstract] |  |
Non-cash interest at imputed rate | 23.00% | 23.00%

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

X
- Definition Non-cash interest at imputed rate. + References No definition available. + Details
Name: | opt_NonCashInterestAtImputedRate
Namespace Prefix: | opt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration