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

Deferred amounts of principal and interest payments on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19.

No definition available.

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