Financial Instruments With Off-balance Sheet Risk - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Risks and Uncertainties [Abstract]
Banks reserve based on analysis in unfunded commitments	$ 700	$ 8

Banks reserve based on analysis in unfunded commitments.

No definition available.

Name:	pnbk_BanksReserveBasedOnAnalysisInUnfundedCommitments
Namespace Prefix:	pnbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant