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Note 8 - Financial Instruments With Off-balance Sheet Risk (Details Textual)	Mar. 31, 2018 USD ($)
Banks Reserve Based on Analysis in Unfunded Commitments	$ 5,000

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- Definition

Banks reserve based on analysis in unfunded commitments.

+ References

No definition available.

+ Details

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