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Summary of significant accounting policies (Tables) | 12 Months Ended
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Dec. 31, 2015
Summary of significant accounting policies |
Schedule of estimated useful life of related assets |
Leasehold improvements |  | Lesser of useful life or lease term
Computer equipment and software |  | 3 years
Furniture, fixtures, and lab equipment |  | 3 to 7 years

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- Definition Tabular disclosure of the useful life of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and are not intended for resale. + References No definition available. + Details
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Namespace Prefix: | ptct_
Data Type: | nonnum:textBlockItemType
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