XML 243 R166.htm IDEA: XBRL DOCUMENT
v3.26.1

Financial instruments - Fair values and risk management - Financial instruments measured at fair value (Details) - Discounted cash flow | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024
Disclosure of fair value measurement of assets [line items] |  |
Time to liquidity event | 4 years |
Volatility rate, measurement input |  |
Disclosure of fair value measurement of assets [line items] |  |
Significant unobservable input, assets (%) |  | 0.700
Risk free rate, measurement input |  |
Disclosure of fair value measurement of assets [line items] |  |
Significant unobservable input, assets (%) |  | 0.0249
Measurement input, discount rate |  |
Disclosure of fair value measurement of assets [line items] |  |
Significant unobservable input, assets (%) |  | 0.175
Lack of marketability, measurement input |  |
Disclosure of fair value measurement of assets [line items] |  |
Significant unobservable input, assets (%) |  | 0.251

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfFairValueMeasurementOfAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The value of significant unobservable input used in the measurement of the fair value of assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2025-01-01 -Paragraph 93 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2025-en-r&anchor=para_93_d&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_SignificantUnobservableInputAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Time To Liquidity Event + References No definition available. + Details
Name: | pre_TimeToLiquidityEvent
Namespace Prefix: | pre_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ValuationTechniquesUsedInFairValueMeasurementAxis=ifrs-full_DiscountedCashFlowMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_UnobservableInputsAxis=pre_VolatilityRateMeasurementInputMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_UnobservableInputsAxis=pre_RiskFreeRateMeasurementInputMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_UnobservableInputsAxis=ifrs-full_DiscountRateMeasurementInputMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_UnobservableInputsAxis=pre_LackOfMarketabilityMeasurementInputMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |