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Other non-current assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Miscellaneous non-current assets [abstract]
Deposits and other receivables - non-current	$ 6,678	$ 1,352

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- References

No definition available.

+ Details

Name:	ifrs-full_MiscellaneousNoncurrentAssetsAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Deposits And Prepayments Non Current

+ References

No definition available.

+ Details

Name:	pre_DepositsAndPrepaymentsNonCurrent
Namespace Prefix:	pre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant