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Accounts payable and accrued expenses - Restructuring (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Restructuring costs
Accrued restructuring costs	$ 1.7	$ 9.0

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- Definition

Represents the carrying value as of the balance sheet date of obligations incurred through that date and payable for restructuring costs.

+ References

No definition available.

+ Details

Name:	ptct_AccruedRestructuringCosts
Namespace Prefix:	ptct_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

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