Represents the amount of potential additional consideration receivable under contractual agreements.

No definition available.

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- Definition

Represents the number of compounds included in preclinical development.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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- Definition

Represents the number of significant deliverables under a contractual agreement.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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- Definition

Represents the research period for applying discovery technology.

+ References

No definition available.

+ Details

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- Details

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- Definition

Represents the term of the grant program.

+ References

No definition available.

+ Details

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- Definition

Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 13

-Section A

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response)

-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780

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- Definition

Revenue from multiple-deliverable arrangements that include licensing fees and services revenue. Licensing revenue is consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Services revenue may be derived by providing other, nonspecified, services during the reporting period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(d),(e))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Details

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Namespace Prefix:
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- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=ptct_CollaborationAndDiscoveryAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Collaborations and grants (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	1 Months Ended			12 Months Ended		0 Months Ended
	Dec. 31, 2014	Nov. 30, 2014	Jan. 31, 2014	Nov. 30, 2011 item	Dec. 31, 2013	Dec. 31, 2012	Jan. 02, 2011 item
Minimum
Grant revenue
Term of grant program	2 years
Maximum
Grant revenue
Term of grant program	5 years
Collaboration agreement \| Development event milestones
Collaborations and grants
Collaboration revenue recognized		$ 10.0	$ 7.5
Collaboration agreement \| Roche and SMA Foundation
Collaborations and grants
Deferred revenue				30.0
Collaboration revenue recognized	20.2				26.6	18.4
Number of compounds in preclinical development				3
Number of significant deliverables				2
Research period for applying technology				2 years
Collaboration agreement \| Roche and SMA Foundation \| Development event milestones \| Maximum
Collaborations and grants
Additional consideration receivable upon achievement of specified events	135.0
Collaboration agreement \| Roche and SMA Foundation \| Sales milestones \| Maximum
Collaborations and grants
Additional consideration receivable upon achievement of specified events	325.0
Early stage collaboration and discovery agreements
Collaborations and grants
Deferred revenue	1.8				0.9
Collaboration revenue recognized	1.3				4.8
Number of significant deliverables							2
Early stage collaboration and discovery agreements \| Minimum
Collaborations and grants
Research period for applying technology	3 years
Early stage collaboration and discovery agreements \| Maximum
Collaborations and grants
Research period for applying technology	4 years
Early stage collaboration and discovery agreements \| Development event milestones
Collaborations and grants
Additional consideration receivable upon achievement of specified events	143.0
Early stage collaboration and discovery agreements \| Sales milestones \| Maximum
Collaborations and grants
Additional consideration receivable upon achievement of specified events	252.0