Note 21 - Fair Value and Interest Rate Risk (Details Textual)	Dec. 31, 2020 $ / shares
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]
Stock Value Par or Stated Value per Share (in dollars per share)	$ 100

Represents information about stock value par or stated value per share.

No definition available.

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Namespace Prefix:	pnbk_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant