Debt - Liability for Sale of Future Royalties (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
Jul. 31, 2020	Sep. 30, 2022
Debt Disclosure [Abstract]
Proceeds from sale of future royalties	$ 650,000
Beginning balance		$ 733,985
Less: Non-cash royalty revenue payable to RPI		(31,617)
Plus: non-cash interest expense recognized		55,778
Ending balance		$ 758,146
Effective interest rate of the liability component	11.00%	9.40%

Amount of liabilities related to the sale of future royalties.

No definition available.

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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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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- 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

- Definition

Cash received for sale of future royalties during the current period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ptct_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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