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Note 23 - Subsequent Event (Details Textual) - USD ($) | Mar. 29, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable, Principal and Interest Deferred Payments |  | $ 232,400,000
Subsequent Event [Member] |  |
Financing Receivable, Principal and Interest Deferred Payments | $ 0 |

X
- Definition Deferred amounts of principal and interest payments on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19. + References No definition available. + Details
Name: | pnbk_FinancingReceivablePrincipalAndInterestDeferredPayments
Namespace Prefix: | pnbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |