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Commitments - Additional Information (Details)	12 Months Ended
	Jun. 30, 2025
Commitments [Abstract]
Termination clause of biggest research contract	60 days
Maximum commitment term	12 months

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- Definition

Commitments.

+ References

No definition available.

+ Details

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Namespace Prefix:	opt_
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- Definition

Maximum commitment term.

+ References

No definition available.

+ Details

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Namespace Prefix:	opt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- Definition

Termination clause of biggest research contract.

+ References

No definition available.

+ Details

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Namespace Prefix:	opt_
Data Type:	xbrli:durationItemType
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Period Type:	duration