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Note 9 - Financial Instruments With Off-balance Sheet Risk (Details Textual) | Sep. 30, 2018 USD ($)
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Banks Reserve Based on Analysis in Unfunded Commitments | $ 8,000

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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