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The monthly percentage fee on hire and on freight of the vessel's gross income.

No definition available.

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Data Type:	dtr-types:percentItemType
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- References

No definition available.

Name:	op_RelatedPartyTransactionAbstract
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Data Type:	xbrli:stringItemType
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Monthly fee charged by a related party to provide management services to vessels employed or available for employment.

No definition available.

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Monthly fee charged by a related party to provide management services to vessels laid-up and not available for employment.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period of time to provide written notice to related party to terminate agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

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

Reference 1: 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

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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Period Type:	instant

Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

No definition available.

Name:	us-gaap_OtherReceivablesNetCurrent
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Amount of transactions with related party during the financial reporting period.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 850
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-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483326/850-10-50-3

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Data Type:	xbrli:monetaryItemType
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Name:	srt_CounterpartyNameAxis=op_DianaWilhelmsenManagementLimitedMember
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