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v3.23.1

Short-term deposits and cash and cash equivalents - Additional Information (Details) | Dec. 31, 2022 | Dec. 31, 2021
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Short term deposits Line [Line Items] |  |
Short term deposits weighted average interest rate point in time | 5.21% | 0.00%

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- Definition Short term deposits Line. + References No definition available. + Details
Name: | pre_ShortTermDepositsLineLineItems
Namespace Prefix: | pre_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Short term deposits weighted average interest rate point in time. + References No definition available. + Details
Name: | pre_ShortTermDepositsWeightedAverageInterestRatePointInTime
Namespace Prefix: | pre_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant