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Long-term loan - Disclosure of long-term loan obligations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance | $ 15,118 | $ 14,818
Accrued interest | 1,755 | 1,502
Interest paid | (1,436) | 1,201
Other | (38) | 0
Ending balance | $ 15,400 | $ 15,118

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- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_Borrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition Borrowings, Accrued Interest + References No definition available. + Details
Name: | ptv_BorrowingsAccruedInterest
Namespace Prefix: | ptv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Borrowings, Interest paid + References No definition available. + Details
Name: | ptv_BorrowingsInterestPaid
Namespace Prefix: | ptv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Borrowings, other + References No definition available. + Details
Name: | ptv_BorrowingsOther
Namespace Prefix: | ptv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration