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Debt - Liability for Sale of Future Royalties (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2025 USD ($)
Debt Disclosure [Abstract] |
Beginning balance | $ 2,081,776
Less: Non-cash royalty revenue payable to Royalty Pharma | (149,160)
Plus: non-cash interest expense recognized | 149,305
Ending balance | $ 2,081,921
Effective interest rate of the liability component | 9.30%

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- Definition Amount of liabilities related to the sale of future royalties. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of interest expense recognized related to the liability for the sale of future royalties per terms of the agreement. + References No definition available. + Details
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- Definition Amount of royalty revenue recognized during the period relating to the sale of future royalties payable under terms of the agreement. + References No definition available. + Details
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Namespace Prefix: | ptct_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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