BALANCE SHEET ACCOUNT DETAILS - Schedule of Other Liabilities and Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Nonrelated Party
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total other liabilities	$ 1,527	$ 1,963
Total other long-term liabilities	20,406	18,908
Related Party
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total other liabilities	1,460	1,879
Accrued interest on Convertible Notes	396	0
Total other long-term liabilities	12,935	11,142
Reedy Creek Purchase Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contractual obligation, current	1,527
Contractual obligation, noncurrent	20,406
Reedy Creek Purchase Agreement \| Nonrelated Party
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contractual obligation, current	1,527	1,963
Total other long-term liabilities	20,406	18,908
Zelsuvmi Royalty Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contractual obligation, current	1,281
Contractual obligation, noncurrent	9,304
Zelsuvmi Royalty Agreement \| Related Party
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contractual obligation, current	1,281	1,540
Contractual obligation, noncurrent	9,304	8,233
Xepi Royalty Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contractual obligation, current	84
Contractual obligation, noncurrent	2,184
Xepi Royalty Agreement \| Related Party
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contractual obligation, current	84	226
Contractual obligation, noncurrent	2,184	1,928
Sato Payments
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contractual obligation, current	95
Contractual obligation, noncurrent	1,051
Sato Payments \| Related Party
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contractual obligation, current	95	113
Contractual obligation, noncurrent	$ 1,051	$ 981

Contractual Obligation, Current

No definition available.

Name:	pths_ContractualObligationCurrent
Namespace Prefix:	pths_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual Obligation, Noncurrent

+ References

No definition available.

+ Details

Name:	pths_ContractualObligationNoncurrent
Namespace Prefix:	pths_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Interest Payable, Noncurrent

+ References

No definition available.

+ Details

Name:	pths_InterestPayableNoncurrent
Namespace Prefix:	pths_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 808
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479402/808-10-50-1

+ Details

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

- Definition

Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-8

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

+ Details

Name:	us-gaap_OtherLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(24))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(23))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_OtherLiabilitiesNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_NonrelatedPartyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_RelatedPartyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=pths_ReedyCreekLicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=pths_ZELSUVMILicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=pths_XepiLicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=pths_SatoLicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: