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

X

- 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

X

- Details

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