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Other non-current assets (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Miscellaneous non-current assets [abstract]
Deposits and prepayments	$ 1,292,462	$ 693,548

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- References

No definition available.

+ Details

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

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- Definition

Amount of deposits and prepayments, non-current.

+ References

No definition available.

+ Details

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