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Note 13 - Fair Value and Interest Rate Risk (Details Textual) | Mar. 31, 2022 $ / shares
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Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] |
Stock Value Par or Stated Value per Share (in dollars per share) | $ 100

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- Definition Represents information about stock value par or stated value per share. + References No definition available. + Details
Name: | pnbk_StockValueParOrStatedValuePerShare
Namespace Prefix: | pnbk_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_FederalHomeLoanBankCertificatesAndObligationsFHLBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |