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Collaboration Revenue (Details) (Collaboration agreement, Roche and SMA Foundation, Clinical development milestones, USD $) In Millions, unless otherwise specified	0 Months Ended
	Jan. 22, 2014
Collaboration agreement | Roche and SMA Foundation | Clinical development milestones
Collaboration Revenue
Milestone payment received from Roche	$ 7.5ptct_MilestonePaymentsReceived / dei_LegalEntityAxis = ptct_RocheAndSMAFoundationMember / ptct_MilestoneAxis = ptct_ClinicalDevelopmentMilestonesMember / us-gaap_TypeOfArrangementAxis = us-gaap_CollaborativeArrangementMember

X

- Definition

Milestone payments received during the period.

+ References

No definition available.

+ Details

Name:	ptct_MilestonePaymentsReceived
Namespace Prefix:	ptct_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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