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Digital assets - Schedule of Holdings of Digital Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Digital assets - Bitcoin
Alternative Assets [Line Items]
Digital assets - Bitcoin	$ 44,629	$ 0

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- Definition

Alternative Assets [Line Items]

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

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- Definition

Digital Assets, Cost

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No definition available.

+ Details

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

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: