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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
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Jan. 22, 2014
Collaboration agreement | Roche and SMA Foundation | Clinical development milestones |
Collaboration Revenue |
Milestone payment received from Roche | $ 7.5 ptct_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