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Long-term loan - Disclosure of long-term loan obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	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

X

- 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

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

X

- 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

X

- 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

X

- Definition

Borrowings, other

+ References

No definition available.

+ Details

Name:	ptv_BorrowingsOther
Namespace Prefix:	ptv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration