Total other costs capitalized in vessel cost consisting of predelivery expenses.

No definition available.

Name:	pshg_CostsCapitalizedInVessels
Namespace Prefix:	pshg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of memoranda of agreement entered into with unrelated parties by the Company to acquire vessels.

+ References

No definition available.

+ Details

Name:	pshg_NumberOfMemorandaOfAgreement
Namespace Prefix:	pshg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of subsidiaries that entered into memoranda of agreement to acquire vessels.

+ References

No definition available.

+ Details

Name:	pshg_NumberOfSubsidiariesAcquiringVessels
Namespace Prefix:	pshg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for pre-delivery costs related to the acquisition of vessels.

+ References

No definition available.

+ Details

Name:	pshg_PaymentsForPreDeliveryCosts
Namespace Prefix:	pshg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	pshg_VesselAcquisitionsAbstract
Namespace Prefix:	pshg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for acquisition of or capital improvements to properties held for investment (operating, managed, leased) or for use.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-13

+ Details

Name:	us-gaap_PaymentsForCapitalImprovements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of increase (decrease) of physical assets used in the normal conduct of business and not intended for resale, from reclassification, impairment, donation, or changes classified as other. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-2

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentTransfersAndChanges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=pshg_BlueMoonMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=pshg_PKikumaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=pshg_AframaxTankersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=pshg_PSophiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=pshg_PAlikiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=pshg_PMontereyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=pshg_PLongBeachMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Vessels, net, Vessel Acquisitions and Vessels' Improvements (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Nov. 30, 2022 USD ($) Subsidiary Agreement	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Vessel Acquisitions [Abstract]
Payments for vessels' improvements		$ 510	$ 2,109	$ 1,777
Number of subsidiaries acquiring vessels \| Subsidiary	4
Number of memoranda of agreement to acquire vessels \| Agreement	4
Blue Moon [Member]
Vessel Acquisitions [Abstract]
Purchase price of the vessels			1,218
Vessels' improvements transferred from other non-current assets			558
Payments for vessels' improvements			1,199
P. Kikuma [Member]
Vessel Acquisitions [Abstract]
Purchase price of the vessels		510
Vessels' improvements transferred from other non-current assets		450
Payments for vessels' improvements			$ 450
Aframax Tankers [Member]
Vessel Acquisitions [Abstract]
Pre-delivery costs capitalized	$ 677
Pre-delivery costs paid		$ 64
P. Sophia [Member]
Vessel Acquisitions [Abstract]
Purchase price of the vessels	27,577
P. Aliki [Member]
Vessel Acquisitions [Abstract]
Purchase price of the vessels	36,500
P. Monterey [Member]
Vessel Acquisitions [Abstract]
Purchase price of the vessels	35,000
P. Long Beach [Member]
Vessel Acquisitions [Abstract]
Purchase price of the vessels	$ 43,750