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The Company (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 item	Dec. 31, 2013
The Company
Accumulated deficit	$ 422,551us-gaap_RetainedEarningsAccumulatedDeficit	$ 328,798us-gaap_RetainedEarningsAccumulatedDeficit
Minimum age of ambulatory patient	5 years
Number of member states of the European Union	31ptct_NumberOfStates

X

- Definition

Represents the minimum age of ambulatory patient.

+ References

No definition available.

+ Details

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Namespace Prefix:	ptct_
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Balance Type:	na
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X

- Definition

Represents the number of states of european union

+ References

No definition available.

+ Details

Name:	ptct_NumberOfStates
Namespace Prefix:	ptct_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

The cumulative amount of the reporting entity's undistributed earnings or deficit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 31

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.31(a)(3))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	credit
Period Type:	instant