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Subsequent events (Details) $ in Millions	Jan. 31, 2023 USD ($)
Subsequent Event | Censa
Subsequent Event [Line Items]
Development milestone payment obligations	$ 30.0

X

- Definition

Represents the development milestones payments which the entity is obligated to pay under certain contractual agreements.

+ References

No definition available.

+ Details

Name:	ptct_DevelopmentMilestonePaymentObligations
Namespace Prefix:	ptct_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=ptct_CensaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: