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Summary of significant accounting policies (Details)		1 Months Ended
	Aug. 04, 2014	Aug. 31, 2014
Summary of significant accounting policies
Minimum age of ambulatory patient	5 years	5 years

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- Definition

Represents the minimum age of ambulatory patient.

+ References

No definition available.

+ Details

Name:	ptct_MinimumAgeOfAmbulatoryPatient
Namespace Prefix:	ptct_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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