Significant Accounting Policies - Recent Accounting Pronouncements, Accounting for Revenues and Expenses (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022
Accounting for Revenues and Expenses [Abstract]
Gain/(loss) on bunkers	$ 63	$ (186)	$ (1,949)

The amount of gain (loss) on bunker fuel during the period. The gain or loss is the difference between the cost of bunker fuel delivered by the terminating charterer and the bunker fuel sold to the new charterer.

No definition available.

Name:	op_LossGainOnBunkerFuel
Namespace Prefix:	op_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration