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Note 14 - Subsequent Events (Details Textual) - USD ($)	Nov. 13, 2020	Sep. 30, 2020
Financing Receivable, Principal and Interest Deferred Payments		$ 244,400,000
Financing Receivable, Loans Remained on Deferment		$ 157,700,000
Subsequent Event [Member]
Financing Receivable, Loans Remained on Deferment	$ 59,100,000

X

- Definition

Represents loans remaining on deferment.

+ References

No definition available.

+ Details

Name:	pnbk_FinancingReceivableLoansRemainingOnDeferment
Namespace Prefix:	pnbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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: