XML 44 R32.htm IDEA: XBRL DOCUMENT v3.25.2

Non-Current Assets - Prepayments

12 Months Ended

Jun. 30, 2025

Disclosure Of Noncurrent Assets Prepayments [Abstract]

Non-Current Assets - Prepayments

Note 22. Non-Current Assets - Prepayments

		June 30, 2025				June 30, 2024
		US$(000's)				US$(000's)
Prepayments			—				467
Total non-current prepayments			—				467

X

- Definition

Disclosure of Noncurrent Assets Prepayments.

+ References

No definition available.

+ Details

Name:	opt_DisclosureOfNoncurrentAssetsPrepaymentsAbstract
Namespace Prefix:	opt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The Entire Disclosure Of Noncurrent Assets Prepayments.

+ References

No definition available.

+ Details

Name:	opt_DisclosureOfNoncurrentAssetsPrepaymentsExplanatory
Namespace Prefix:	opt_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration