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Note 14 - Subsequent Events (Details Textual) - Subsequent Event [Member] $ in Millions | Jun. 08, 2020 USD ($)
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Financing Receivable, Number of Principal and Interest Payment Deferrals | 240
Financing Receivable, Principal and Interest Deferred Payments | $ 219

X
- Definition Represents amount of deferred payments requests for financing receivable. + References No definition available. + Details
Name: | pnbk_FinancingReceivableDeferredPaymentsRequestsAmount
Namespace Prefix: | pnbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents number of request for payment deferrals. + References No definition available. + Details
Name: | pnbk_FinancingReceivableNumberOfRequestsForPaymentDeferrals
Namespace Prefix: | pnbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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